Question

Find ∠1 and ∠2 in the given triangle
And also state the property used.
Please answer fast

Answer 1

let the exterior opposite angle be x

20°+60°=x(sum of interior opposite angle equal to exterior opposite angle)

80°=x

let interior 3rd angle be z

80°+z=180°(by linear pair)

z=180°-80°

z=100°

Answer 2

Answer:

let 1 be x

20 +60+x=180 (sum of interior angles of triangle is 180 degree)

So 80+x=180

x=180-80=100

let 2 be a

100+a=180(both are linear pair)

a=180-100

a=80 ans

hope it helps