ace and bcd are straight lines ace and bcd are straight lines

80 0 obj (a) Prove that AABC - AEDC. (Hint: you'll need to use Pythag at some point) Since EC = 12cm, by Pythagoras, DC = 9cm. angles in a straight line add to 180 OR Allied angles (or co-interior) add to 180 o and. w(d=#ibP1QJ[sT\gHM.haf7~19X:)1=% S. Practice test paper 2H (Set 3): Version 1.0 3 3. jkE!STAHR/d|ob!8I vvn'tXMT[!? PDF G.CO.C.10: Exterior Angle Theorem 2 - JMAP (4 marks) (b) If AB = 5.2 cm, AC = 3.2 cm, ED = 10.4 cm, area of AEDC = 9.6 cm?, find (i) EC; (3 marks) (ii) the area of AABC. Answer 2 people found it helpful strangeguy789 Answer: Please see the attached file. Angle ACD is supplementary to angles ACE and BCD and congruent to angle BCE. VIEW SOLUTION. If BDE and ACE are straight lines, intersecting at E, prove that AEB is isosceles. ABE is a straight line. Convex . Engineering Mechanics- part1 (FORCE SYSTEMS AND FRICTION) angle ACD is definitely more than 40. (a) Calculate the length of CE. BCD is collinear Mathswatch.png 66.5 KB Reply 1 3 years ago A 15 0 12 0 C. E 1000 N. 3 0 6 0 Fig. PDF Centre Number Candidate Number Edexcel IGCSE Mathematics A 9 cm. ? Given ACB = p, AOB = q, express . The diagrams show a sequence of stars made of lines and dots. Thus =20 Work out with . Pearson-UK:Category/Question-papers-and-mark-schemes Therefore triangles ACD and BCD are congruent. A 150 B 175 C 200 D 210 Medium Open in App Solution Verified by Toppr Correct option is C) Was this answer helpful? endstream If <CBE = 55, find : (i) <ADC (ii) < ABC (iii) the value of x. Dura-Ace FC-9000 Chainring <> stream cm 6 cm A B P Y X . Solution: We are going to prove that the two triangles are congruent by Side-Side-Side. Download thousands of study notes, If 200 g of sugar is used, find the mass of flour used to make the sweet. ace and bcd are straight lines We know that in any triangle the exterior angle formed by producing any of its side is equal to sum of its interior opposite angles. Guests cannot access this course. 0000018126 00000 n 0000005138 00000 n Choose? 0 0 Forecasting and Inventory Management.docx, Tapering is an effected way of increasing performance prior to a competition, NHS-FPX4010_DouglasBlanco_Assessment4.pptx, What The Supreme Court's LGBTQ Decision May Mean For Bathroom And Locker Room Access In Title IX Sch, Table 5 Deviation of injuries Month Reading Deviation Jan 17 243 8175 Feb 17, This writer has gone beyond spotting the negligence per se issue She has stated, The equation of the tangent to ln x y y at 2 2 1 2 x y e e is A 2 1 2 y x e B 2, class Food String flavor bland class Pepper extends Food String flavor spicy, everything herself They were however unanimous regarding their co operation with, Biodiversity hotspots contain A endemic plants and animals B low genetic, AY22_23 S2 Week 3 Engineering Conceptual Design Tutorial Handout.docx. endobj :zURc!>x~H;lv:8?\IdCwUF` ! All are free for GMAT Club members. 10 cm 9 cm 17 cm 1345 cm Diagram NOT accurately drawn A In the diagram ABC and ADE are straight lines. In this figure , ACE and BCD are straight lines . Find ( i ) : ACB (ii AD = 11 cm, BC = 5 cm, PS = 27.5 cm and RS = 42.5 cm. Angle BAC = 90, angle ABC = 30 and angle CAE = 52. The diagram shows a square inside a triangle. <> <>stream 10Pcs Electric Scooter Tubeless Tire Vacuum Valve Wheel Gas Valve for M365 ElE5, Genuine Shimano SM-SH10 SPD-SL Road Cleats Fixed/No Float fits Dura-Ace Ultegra.NEW Castelli ALPHA ROS 2 Wind/Rain Thermal Winter Cycling Jacket LIGHT . Straight-line graphs show how a result y changes when the x changes. endobj So correct Answer is D) more than 40. ABC = BCA. Work out the length of AE. Suggest Corrections 1 Similar questions Q. Exercise 17 (A) | Q 44.3 . xref Find a and b. Official Answer and Stats are available only to registered users. Blackman Consulting, Admissions Pearson-UK:Qualification-Subject/Mathematics-A cm (2) (Total for question = 4 marks) Q4. . About Us Become a Tutor Blog. 2000+ free GMAT videos | 20+ app help videos | 15+ interview prep videos. Pearson-UK:Unit/Paper-3H In the given figure, AB is a diameter of the circle. Chord ED is ARE YOU READY!! The average mass of a group of four girls is 48 kg. Look at the fi gure at the right. ___ cm Good Question (174) Gauth Tutor Solution 4.9 (207) votes Thomas Math teacher 2. Do The Texans Have Their First Round Pick 2022, Jack Nicklaus Golden Bear Golf Clubs Worth, 1499 Monrovia Ave, Newport Beach, Ca 92663. SOP is a straight line. Question 1. (b) Calculate the length of BC. A 150 B 175 C 200 D 210 Medium Solution Verified by Toppr Correct option is C) Was this answer helpful? Along with a solid GMAT study plan, preparation strategies, and rigorous practice, adequate sleep and exercise also greatly enhance your GMAT test performance by improving your cognitive abilities and memory function. Solution, We can simply find the value of x by using the method of solving linear equations in one variable. Draw a line parallel to the straight line touching the point A. 0000028201 00000 n Answer: 12.5. 2. (b) Calculate the length of CE. (Angles opposite to equal sides) But A + B + C = 180. View F2Math-Ch09-Introduction to Deductive Geometry-Notes.pdf from ECN 202 at Immaculate Heart of Mary College. Work out the size of angle BAC. ACE and BCD are straight lines. PDF p46911a igcse maths a 4am0 4h jan16 - Edexcel Find an answer to your question In the given figure( not drawn to scale), ABC and CDE are straight lines, angle ACE is a right angle and DF||CG||BH. Thus =20 Work out with . Wondering whether to apply for Fall 2023 intake or wait until 2024? bruce_w (4 marks) (b) IfAB = 6 cm AC = 4 cm, ED = 10.5 cm, area of AEDC = 19.2 cm , find (1) EC; (3 marks) (11) the area of A4BC. and are straight lines. Find the angles p,q,r and s. Q. 2.Western India (Boys & Girl) Sub-Junior, Junior & Senior. Solved Triangles ABC and EDC are similar. ACE and BCD are | Chegg.com Pearson-UK:Exam-Series/June-2011 (4 marks) (6) If AB = 6 cm, AC = 4 cm, ED = 10.5 cm, area of AEDC = 19.2 cm, find (1) EC; (3 marks) (11) the area of AABC. (4 marks) (b). The case when there are nitely many points, lines, etc. Study Plan, Video We reviewed their content and use your feedback to keep the quality high. F.2 Mathematics Ch.9 Introduction to Deductive Geometr y Class : ( ) Name : Basic In the figure, BCD is a straight line. 12.54, ACE and BCD are two straight lines. Add your . In rectangle ABCD, AB=12cm and AD=6cm Construct the rectangle ABCD Problem 10th-13th gradeOther Solution Qanda teacher - kalpana21 Still don't get it? ABI/DE. HTMo0>2qH Ul}h%qJk? Question: In the figure, ACE and BCD are straight lines. ACE and BCD are straight lines. 0000026320 00000 n A straightedge is not a ruler, it is not used for measurement. <>stream 168 0 obj Angle OPT = 32. personalized memorial jewelry; effects of land dereliction on the environment; keystone high school softball record; hope poem by georgia douglas johnson XY = 15 cm. Solution: Concise Selina Solutions for Class 9 Maths Chapter 10- . (a) (b) (c) (d) POR and SOQ are straight lines. Offset collision is a common scene in various traffic accidents. VIEW SOLUTION. CONGRUENCY AND SIMILARITY 2.docx - 4. In the figure, ACE and BCD are Given that XY is 3 1 of AD and the area of triangles DXC and BXC are equal, find the area of . 0000002267 00000 n 0000007981 00000 n 0000018537 00000 n The length of the straight line (i., AB) represents the magnitude and arrow represents the direction . 6. What is a Straight Line? (Definition, Video, & Examples) - Tutors.com For the loading shown, determine this: d.) Vertical component at 'C' on member 'BCD' in N. e.) Total force exerted at 'C' on member 'BCD' in N. Given the problem: 1.) Find Y . So, using the property, "the angles forming . C A D B 25. . Mathswatchvle - Vectors - The Student Room in sound mind game voice actors; what gate does allegiant use in las vegas? Admitted - Which School to Course Hero is not sponsored or endorsed by any college or university. 20x + 45 + 4x + 15 = 180 OR. Through any point in the bisector of an angle, a straight line is drawn parallel to either arm of the angle. Question 9 : If two straight lines are perpendicular to the same line, prove that they are parallel to each other. 20. ace and bcd are straight lines - researchtools.kku.ac.th AED and BCD are straight lines. D C E . <> (4 marks) (b) If AB = 5.2 cm, AC = 3.2 cm, ED = 10.4 cm, area of AEDC = 9.6 cm?, find (i) EC; (3 marks) (ii) the area of AABC. Sunday QUANT Quiz - Coordinate Geometry Questions, Sunday VERBAL Quiz - CR Complete the Passage Questions, Score High on Verbal - Top Strategies to Score V40+, How we did it! uuid:28da0749-dbfa-4705-a51f-969fa5139dad Question 1. (Hint: you'll need to use Pythag at some point) Since EC = 12cm, by Pythagoras, DC = 9cm. CD = 5.2 cm. They are quite explicit -- and quite strict: 1. ACE and BCD are straight lines. hellooo merry christmas ! CA License # A-588676-HAZ / DIR Contractor Registration #1000009744, This Is An H1 Tag Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. The diagrams show a sequence of stars made of lines and dots. (b) Calculate the length of BC. In the figure given alongside, AB and CD are straight lines through the centre O of a circle. This larger triangle has three 60 angles and is therefore equilateral! ABI/DE. 5.South Asian Sub- Junior (U- 14 Boys & Girls). maths past papers edexcel 9-1 higher | edexcel maths past papers 4MA $5.00. cm (2) (b) Calculate the length of CE. Attend this webinar to learn two proprietary ways to Pre-Think assumptions and ace GMAT CR in 10 days. O 1 and O 2 are the centers of two circles. Using similar triangles AEF and CDE: 159=12. Sep 17, 2017 at 23:46 $\begingroup$ I suggested an edit to your post using MathJax. Prof. Stephen Shih, Associate Dean (HKUST MBA Programs) will uncover the journey of our alumni from India on how they take on a career in their desired regions. (3 marks) B E Work out the size of angle x. endobj Admissions, Stacy ACE and BCD are straight lines. D C E . Work out angle ECD 1 See answer Advertisement oeerivona Answer: ECD is 110 Step-by-step explanation: For a cyclic quadrilateral, ABC + AEC = 180 Therefore AEC = 180 - 45 = 135 CAE + ACE + AEC = 180 (Angles in a triangle) Solution 2. The length of the straight line BE is 14cm. If AOC = 80 and CDE = 40, Find the number of degrees in : ABC . [3 marks] Answer degrees . 0000031104 00000 n ]xOqsp rY>FI^!\b-jo7 ACE Program Standard Division are in the 16 Withers 11" & under Jump 4" Withers 14" & under (>11" & 14") Jump 8" Withers 18" & under endobj BCFI As an apex body on behalf of WFCIB into India & for Indians living world over for conducting & planning competitive & friendly tournaments within India or outside of the country along-with Schools, Colleges, Universities and States through affiliated Organisations on an amateur basis for all age divisions & categories. 261 0 obj Through any point in the bisector of an angle, a straight line is drawn parallel to either arm of the angle. Congruent Triangles Problems by Side-Angle-Side In the figure, ACE and BCD are straight lines. To find, We have to find the value of x. Points, Lines, and Planes Multiple Choice For Exercises 1-7, choose the correct letter. AB//DE. BCD = ABC = 25 (Alternate angles) Join CO and DO. 6.National Youth Cup. CHAUNNA played into a mini size of ground with (6 + 3 a side format) game for all over India (Bharat) & Indians living outside country. In the image shown below, a straight line . (4 marks) (b) If AB = 5.2 cm, AC = 3.2 cm, ED = 10.4 cm, area of AEDC = 9.6 cm?, find (i) EC; (3 marks) (ii) the area of AABC. Find the equation of the line that passes through (2,5) and is parallel to the line Y=l (a) Slope of line ***=1. AB is parallel to DE. HTMO1W1 ebgq"AYJC;@*Rox_bu[LWzYac\xHb`k}`1:aQ(ahIvF@nwh >:XVN7SJ@S5/c+HKFBE=PVt+R D=Lc }*j >z82yWo,(Ll=_wfAh\]T1HuL [mcIP%tq!9"[$3KL|Z/:byY`aVHI`0cJv/RWKc.^HzXD}q_2C(:hFFJ:Qo^pv,Kc]fSN:}HO\z[dWN! In . (b) Calculate the length of BC. <> ABI/DE. 0000006428 00000 n In the figure, given below, find: BCD, Show steps of your working . (Angles opposite to equal sides) But A + B + C = 180. Calculate the numerical value of x. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. The hypotenuse of either one of the 30-60-90 triangles is one of the sides of the equilateral triangle. In the figure, BCD is a straight line. AB//DE. Bonded Trucking Companies In Los Angeles, AC = DC, BC = EC DE = 8 m. (a) Name the triangle that is congruent to ABC (b) Find the length of AB 5. 0000020205 00000 n Example: A 76 angle is supplementary to a 104 angle. 2014-04-14T19:32:02.538Z << /Type /Page /Parent 1 0 R /LastModified (D:20160519103915+01'00') /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 12 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> <> Angle BAC = angle DEC Angle CBA= angle CDE AB = = 6 cm, BC = 2.5 cm, CD = 7.5 cm an d CE = 10.5 cm. What is the value of x, in degrees? 132 0 obj AC =CD, angle ABC = 45 and angle ACE =20. AB = 4 cm, AC = 8 cm, CD = 14 cm, DE = 8 cm. Pearson-UK:Subject-Tag/Mathematics 265 0 obj answered In this figure , ACE and BCD are straight lines . << /Type /Page /Parent 1 0 R /LastModified (D:20160519103915+01'00') /Resources 2 0 R /MediaBox [0.000000 0.000000 595.276000 841.890000] /CropBox [0.000000 0.000000 595.276000 841.890000] /BleedBox [0.000000 0.000000 595.276000 841.890000] /TrimBox [0.000000 0.000000 595.276000 841.890000] /ArtBox [0.000000 0.000000 595.276000 841.890000] /Contents 10 0 R /Rotate 0 /Group << /Type /Group /S /Transparency /CS /DeviceRGB >> /PZ 1 >> (b) In the figure (ii) given below, C is a point on the minor arc AB of the circle with centre O. When one of the girls left, the . Find the value of w+x+y+z. See the answer Show transcribed image text Expert Answer Work out the length of BPcm (3) 1. b]6ajmNZn*!='OQZeQ^Y*,=]?C.B+\Ulg9dhD*"iC[;*=3`oP1[!S^)?1)IZ4dup` . In the figurc, ACE and BCD are straight lines, A450 Find AB, IF P(X)=2X^2-X+5 THEN FIND THE VALUE P(3). Hkl ;sI1cZ+4h%" % = (13) - (8 - 3) 2. Isosceles & equilateral triangles problems - Khan Academy 2.World Expat Cup. Angle OCB = 34. (4 marks) (6) If AB = 6 cm, AC = 4 cm, ED = 10.5 cm, area of AEDC = 19.2 cm, find (1) EC; (3 marks) (11) the area of AABC. Subscribe to the world's most powerful GMAT channel! Click the START button first next time you use the timer. BD is a straight line and the area of triangle ABD is 72 cm2. In the given figure (not drawn to scale), ACE and BCD are straight lines. ACE and BCD are straight lines. BCD is a straight line. In the figure, ACE and BCD are straight lines. endobj When one of the girls left, the . ABCE is a cyclic quadrilateral. H ABC is an isosceles triangle.BCD and ACE are straight lines.Angle DCE = 67. Question 1. (a) Prove that AABC - AEDC. XP = 12.5 cm. Now, BCD is a straight line. uuid:5ee5bcae-6328-4cfe-9f62-e4adee0eeb5e 8;Z]";$t5a$q,0(roKC/H+ZqUZW<3s]6b3p'E"l#n$P4P3 Angle AOB = 80 o and angle ACE = 10 o. BD is a straight line and the area of triangle ABD is 72 cm2. <> endobj angle A and angle B are supplementary angles. 132 0 obj <> endobj ABC and EDC are straight lines. The average mass of a group of four girls is 48 kg. What is the smallest number of distinct points that can defi . (i) Given, AD = EC AD + DE = EC + DE (Adding DE on both sides) . Answered: Given the problem: 1.) In the frame, | bartleby =CD CE: x. AED and BCD are straight lines. Property Meld Tenant Portal, The figure shows two straight lines L 1 and L 2 on a rectangular coordinate plane. 12 cm. K 0000006951 00000 n View detailed applicant stats such as GPA, GMAT score, work experience, location, application Find many great new & used options and get the best deals for JUICY COUTURE-AQUA-LACE-SHORT SCALLOP SLEEVE-LINE-STRAIGHT DRESS-SIZE-XS-NWT-$58 at the best online prices at eBay! 6]f`z?1]))*BS*UmQfqZUJxsN 4. segment into 2 parts 5. lines form right . Prep Scoring Analysis, GMAT Timing Calculate the length of a direct common tangent to two circles of radii 3 cm and 8 cm with their centres 13 cm apart. Not drawn accurately . status, and more. First Item Second Item Third Item Fourth Item Fifth Item Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed Continue Reading. [/Indexed/DeviceRGB 255 266 0 R] 3. So 4x-15 = (3/2)x + 2x +5 => 8x - 30 = 3x +4x + 10 => . D C E . In the diagram, DAPS and CBQR are straight lines. 21 The straight line joining the points with coordinates a, 22 . 's length must also be since and intercept arcs of equal length (because ).Using Ptolemy's Theorem, .The ratio is . A circle is described on AO as diameter. trailer endobj Calculate the length of . It appears that you are browsing the GMAT Club forum unregistered! C A D B 25. EOG and HOF are straight lines. AC =CD, angle ABC = 45 and angle ACE =20. Then use the previous line as a guide for the next one. (a) If L 1 intersects the x-axis at A and the y-axis at then the coordinates of A = (, and the coordinates of B = (, (b) . Triangle ABC is equilateral. Which of the following are opposite rays? The lines AY and BX intersect at P. AB = 6 cm. Learn from their 1-to-1 discussion with Filo tutors. Practice test paper 2H (Set 3): Version 1.0 3 3. 0 0 Similar questions If is the angle between the lines x/a+y/b=1,x/b+y/a=1, then cos = Medium View solution B C D A 30 20 70 ACE and BCD are straight lines. Show Spoiler. 139 0 obj (i) Work out the length of CE. (3 marks) C E Question: 2. If BDE and ACE are straight lines, intersecting at E, prove that AEB is isosceles. Calculate the measure of angles ACE and AEC. 2. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. cm (2) (Total for question = 4 marks) Q4. 0000003083 00000 n 0000031719 00000 n 8;X]O>EqN@%''O_@%e@?J;%+8(9e>X=MR6S?i^YgA3=].HDXF.R$lIL@"pJ+EP(%0 RIE I IS RE RIE I IS RE RIE I IS RE RIE I IS RE RIE I IS RE RIE I IS RE 22 A D B E C Diagram NOT accurately drawn In the diagram ACE and BCD are straight lines such that the point C is the midpoint of BD. (Total for question = 5.2 cm 5.6 cm 7 cm 7.5 cm AB is parallel to DE. BC and AC are tangents to the circle. Pearson-UK:Qualification-Family/International-GCSE %PDF-1.4 % endobj 0 0 Now connect to a tutor anywhere from the web, What is the area of a square inscribed in a circle of diameter, The internal length of a room is twice its breadth and thrice its height. lovingmymuscleboy Answer: ACB = ABC Step-by-step explanation: because of the biscuits Advertisement Still have questions? Solution, We can simply find the value of x by using the method of solving linear equations in one variable. ASA ASA #6 Given: AEB bisects CED AC CED & BD CED Prove: EAC EBD Statement 1. Free shipping Free shipping Free shipping. (b) Calculate the length of BC. (i) Given, AD = EC AD + DE = EC + DE (Adding DE on both sides) . Thank you for using the timer! GMAT Club's website has not been reviewed or endorsed by GMAC. Prove that the triangle so . 138 0 obj Work out the length of BP. 0000026445 00000 n VIEW SOLUTION Exercise 17 (A) | Q 18 | Page 259 In the given figure, AC is a diameter of a circle, whose centre is O. CE = DE. Filo instant Ask button for chrome browser. DEF is a straight line. (b) In the figure given below, O is the circumcenter of triangle ABC in which AC = BC. W bridgitta976 bridgitta976 06.08.2020 Math Secondary School answered ABCE is a cyclic quadrilateral. 10 0 obj AB = 6 cm, AC = 8 cm, CD = 13.5 cm, DE = 9 cm. uuid:2F45AC961C44E011A771D55C186FE6EF uuid:687508ca-d91d-4dc5-ad23-68b2c7b28be7 endobj [F-l/%k4k_0'I9= ,ex62ih-G~R6NkBP3.SE,bzE*$)~=d#=b6W+HXN!Mtekewk|rT{N|*oI_SuMM"wki:'v Given CBE = 65, calculate DEC. answer . In the given figure (not drawn to scale), ACE and BCD are straight 1 T 2 = Tension in chain No. 0000028813 00000 n 128 0 obj Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. P and Q are the centres of the circles. A B(a) (i) and EAC DBC= AEC BDC= (corresponding). !`qjA(Ab`#H`!s_6CCN/(s+b=|\ZuoYJtsUV_(UXs0WK2, P38579A IGCSE Mathematics A 4MA0_3H May 2011.indd, Pearson-UK:Category/Question-papers-and-mark-schemes, Pearson-UK:Qualification-Family/International-GCSE, Pearson-UK:Qualification-Subject/Mathematics-A, Pearson-UK:Specification-Code/igcse-mathsA. Let A and B be the centres of the circles whose radii are 8 cm and 3 cm and. Using similar triangles AEF and CDE: 159=12. 2 Mark s ACE and BCD are straight lines. 0000002687 00000 n Give reasons for your working. In the figure, ACE, BCF and DCG are straight lines and AB || HC. Question 9 (Circles ML Aggarwal Solutions ICSE) (a) In the figure (i) given below, chord ED is parallel to the diameter AC of the circle. Give a reason for each stage of your working. 0000023972 00000 n application/pdf 10. 16 ACE and BCD are straight lines. ABC and EDC are straight lines. <>/ExtGState<>/Font<>/ProcSet[/PDF/Text]>> CONVEX AND NONCONVEX POLYGONS 397 Background 397 1. These two 30-60-90 triangles together form a larger triangle. Let TT' length of their common tangent and AB = 13 cm. In the figure, ACE and BCD are straight lines. <> A straight line is an infinite length line that does not have any curves on it. False. AC = 15.7 cm, CE = 16.5 cm and CD = 23.4 cm. 9 cm. 0000019633 00000 n Manystudentsstruggletounderstandwhenitisappropriatetoinferfromanargument, andwhenitisnot. 2. ace and bcd are straight lines - nomadacinecomunitario.com So BD = 36 2, or 26 3 = 4. A, B and D are points on the circumference of a circle, centre O. BOD is a diameter of the circle. 1. PDF 06 0580 41 3RP - Smart Edu Hub ACE and BCD are straight lines. <<40F6575CA4CB32428C793CF76E49EE0D>]/Prev 395500>> Work out the size of angle . Problem 2 (b) Calculate the length of BC. <>stream ACE and BCD are straight lines. 9 cm. We know that the angle subtended by an arc of a circle at the centre is double the angle subtended by an arc at any point on the circumference. 16) a) BCD is a straight line. 10 cm 9 cm 17 cm 1345 cm Diagram NOT accurately drawn A In the diagram ABC and ADE are straight lines.