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By C. Oliver, A. Ledsham, R. Elvin

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Extra resources for Comprehensive Mathematics Practice: Bk. 2

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3. 5. ,. 2. 4. 6. ,,,), do{,,. ~.. a. Find the size of 360°-170° -12o 0 = 190°- 120° = 70° a= Exercise 53 For each question, find the size of the lettered angle. 1. 2. 1 Angles 3. 4. b) Because b is vertically opposite to 80° b"' = 80° c) Because~ is vertically opposite to = 100 c a Exercise 54 6. 5. Two straight lines cross to form four angles, ;;, b, ~. and d. Find the unknown angles formed by the straight lines in each. 1. 2. 3. 4. 5. ~6. ~~ Two pairs of angles are equal. 1\ /'. A /\ t a= c b=d Each pair of equal angles are known as vertically opposite angles.

3. Construct a triangle ABC in which AB = 10 em, BAC = 60° and ABC= 45°. Bisect each side and mark where these bisectors meet with the letter X. Draw a circle of radius XA with its centre at X. What do you notice about this circle? 4. Reconstruct the triangle referred to in question 3. Bisect each angle and mark where these bisectors meet with the letter Y. 4 em with its centre at Y. What do you notice about this circle? 5. Construct a triangle PQR in which PQ = PR = 7 em, QPR = 90° and PQR = 45°.

5 99 4. iOo 9. so19 4 14. 25 19. 25 13 3 24. 4 5. 3 100 27 10. 5o 6 15. 25 14 20. 25 I 25. 2 19 13. D 80 17 16 6ii 17 6ii 29 18. fa 11 2 23. fs 21. 12 Write the following as a percentage . 29 3. ~ 12. So 0 Exercise 50 7 80 11. % 2 b)~ to= 9:10 b) = 3:8 = 300 :800 0 22. 15 2 4. 9 13 9. So 14. 30 19 19. Po 1 24. 15 3 5. 4o 21 10. So II 15. 30 20. Ti 4 25. 15 REVISION EXERCISE B 1. Boldon Heworth What is the distance from Newcastle to Sunderland? 2. What is the height of the birdhouse? Express your answer a) in fractional form, b) in decimal form.

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