Question

CAN SOMEONE PLEASE SOLVE THIS??????????? NEED HELP!!!!!!!

Answer 1

1. D) 141°

2. B) 13

3. C) 20

Explanation:

1.

Total angle: (7-2)×180 = 900

120 + 129 + X + 148 + 90 + 142 + 130 = 900

X = 900 - 759

X = 141°

2.

(n - 2) × 180 = 1980

n - 2 = 11

n = 13

3. Each exterior angle of a regular polygon is:

360/n

360/n = 18

n = 360/18

n = 20