Question

Find the measure of angle A If Angle A = 2x+18 and angle C = 3x+12

Answer 1

Below in bold.

Explanation:

2x + 18 + 3x + 12 = 180 (property of a cyclic quadrilateral).

5x = 180 - 18 -12

5x = 150

x = 30

So m < A = 2(30)+18

= 78 degrees.