Question

give answer step by step​

Answer 1

Answer:

Steps are below:-

Step-by-step explanation:

<1+<2= 180°

140°+<2= 180°

<2= 180°-140°

<2= 40°

And, <3=<1 (Vertically opposite angles)

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Answer 2

Answer:

it's = 180 ( because these two angle form a straight line, and sum of angle is straight line is 180)