Question

In the following figure, AB and CD are two lines intersecting at O, then find the
value of m.

Answer 1

Answer:

20

120+2m+m=180°. 120+3m =180° . 3m=180°-120°=60°; m=60°/3=20°

Answer 2

Step-by-step explanation:

AB= 120° + 2m + m = 180°

120° + 3m = 180°

3m = 180° - 120°

3m = 160°

m = 60° ÷ 3

m = 20°

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