Question

T
An angle of size 120° is shown on the diagram.
(b) (i) Write down the letter of one other angle of size 120°
Give a reason for your answer.
3
(ii) Explain why a + b + c = 240°
(1)
(Total for Question 10 is 7 marks)​

Answer 1

Answer:

1) Angle b = 120° by vertically opposite angle rule

2) a+b+c+ 120° = 360° by complete angle

a+b+c = 360°- 120°

so, a+b+c = 240°