Question

Which equation would you use to solve for the value of a?

A. a + 76 = 180
B. 2a + 76 = 90
C. 2a + 76 = 180
D. 180 - 76 = a

Answer 1

Explanation:

Solution,

In above figure,

a+a+76°=180° (being straight angles)

2a+76°=180°

2a=180°-76°

2a=104°

a=104°/2

a=52°

Hence, I will use option c. 2a+76°=180° for calculation.