Question

Find the value of a in the following figure

Answer 1

80°

Explanation:

the sum of interior angles of a triangle is equal to 180°

a°=180-30-70=80°

Answer 2

80°

Explanation:

it is an opposite angle, it has the same value of the interior angle.

the sum of the interior angles of a triangle is 180°

180 - 30 - 70 = 80°