Answer:
∠ A = 50°
Step-by-step explanation:
the angle inside the triangle and 85° are adjacent angles and sum to 180°
180° - 85° = 95°
the exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.
145° is an exterior angle of the triangle , then
∠ A + 95° = 145° ( subtract 95° from both sides )
∠ A = 50°
