Question

What is the answer for this

Answer 1

∠B = 141

Explanation:

n - > number of sides

n = 7

Sum of all interior angles = (n -2 ) * 180

= 5 * 180 = 900

∠B + 148 + 90 + 142 + 130 + 129 + 120 = 900

∠B + 759 = 900

∠B = 900 - 759 = 141