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Question

Find the value of each interior angle of a regular decagon.


A

60

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B

144

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C

90

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D

1440

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Solution

The correct option is D

144


A regular polygon is a polygon in which all the sides and angles are equal.

A decagon is a polygon having 10 sides.

Exterior angle (e°) = 360°10

Exterior angle (e°) = 36°

We know, Interior angle (i°) + Exterior angle (e°) = 180°

Interior angle (i°) + 36 = 180°

Interior angle (i°) = 144°


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