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  • 22-04-2020
  • Mathematics
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CAN SOMEONE PLEASE SOLVE THIS??????????? NEED HELP!!!!!!!

CAN SOMEONE PLEASE SOLVE THIS NEED HELP class=

Respuesta :

amna04352
amna04352 amna04352
  • 22-04-2020

Answer:

1. D) 141°

2. B) 13

3. C) 20

Step-by-step 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

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