Question

answer given in answer sheet. - angle 4= 60 degree, angle 7 = 120 degree​

Answer 1

Step-by-step explanation:

let angle 1 = 2x and 2 = 1x

therefore , 1x + 2x = 180⁰

3x = 180⁰

x = 180⁰/3 = 60⁰

therefore , angle 1 = 2x = 120⁰and angle 2 = 1x = 60⁰

Now , angle 1 = angle 7 = 120⁰ [alternate angles]

angle 2 = angle 4 = 60⁰ [opposite angle ]

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