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  • 02-03-2018
  • Mathematics
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Question 10-12 geometry

Question 1012 geometry class=

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choixongdong
choixongdong choixongdong
  • 02-03-2018
10)
(n-2) x 180 = 2160
n - 2 = 12
n = 14

answer
C. 14

11)
interior angle = [(11 - 2) x 180] / 11
= (9 x 180) / 11
= 1620/11
= 147.27

exterior angle = 180 - 147.27 = 32.72

12)
heptagon  has 7 sides, n = 7
interior angle = [(5 x 180)/7 = 900 / 7  = 128.57
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