Didn't understand concept in this problem

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asked Sep 1, 2018 213k views

2 Answers

Favor · Answer 1 · 2018-09-03T07:51:57+0000

To find the sum of the interior angles of a polygon, use the formula (n-2) x 180. Plug in the numbers to get your sum. 11-2=9 x 180 =1620, so it's not A. 13-2=11 x 180= 1980, so it's not B. 15-2=13 x 180 = 2340. Your answer is C.15.

Ravinder Bhandari · Answer 2 · 2018-09-05T13:21:23+0000

(n-2)180=sum of the interior angles.

Where n=number of angles of a regular polygon.

(n-2)180=2340

divide both sides by 180 and get

n-2=13

add 2 to both sides and get

n=15 Therefore, this polygon has 15 sides.

Didn't understand concept in this problem

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