Question

In a quadrilateral A B C D angle d is

equal to 150° and angle a = angle b=angle c
Eind angle A, angle b, and angle c​

Answer 1

Explanation:

Let ∠A = x

Therefore, ∠A = ∠B = ∠C = x

The sum of all angles of a quadrilateral is 360

∠D + ∠A + ∠B + ∠C =360

150 +x + x + x =360

150 + 3x = 360

3x = 360 - 150

3x = 210

x = 210/3

x = 70

∠A = ∠B = ∠C = x = 70°