Question

Find the value of <A in the following figure.
O
120°
105°
B.
​

Answer 1

Interior angle A = 45°

Step-by-step explanation:

Given:

Exterior angle B = 120°

Exterior angle C = 105°

Find:

Interior angle A

Computation:

Interior angle A = [Exterior angle B + Exterior angle C] - 180

Interior angle A = [120+105] - 180

Interior angle A = 45°