Jawaban:

6. C. Tumpul

7. D. Siku-siku

8. B. (ii) dan (iv)

9. 180° = 90° + 30° + <K

<K = 180° - 120°

<K = 60° (D)

10. 180°/3 = 60° (B)

11. D. (360°)

12. 180° = 65°+65°+<M

<M = 180° - 130°

<M = 50° (B)

13. D. 90°

14. 180° = 35° + 100° + <x

<x= 180° - 135°

<x= 45° (C)

15. D. 360°

16. A. 60°

17. Total sudut segi empat= 360°

360°= 110° + 90° + 140° + <C

<C= 360° - 340°

<C= 20° (B)

18. 30° × 4 = 120° (C)

19. 360° = <P + <R + <Q + <S

360° = 2<P + 2.110°

360° - 220° = 2<P

140° = 2<P

<P = 140/2 = 70° (C)

20. <A = <C

<B = <D

<A = 55°

360° = 2<A + 2<B

360° = 2.55 + 2<B

360 - 110 = 2<B

250° = 2<B

<B = 250°/2 = 125°

<A + <B = 125 + 55 = 180° (D)

NB: <A + <B = berpelurus