Math, asked by sahana131094, 11 months ago

prove that the exterior angle of a regular decagon is one third the interior angle of a regular pentagon​

Answers

Answered by kanchisingh66
1

Answer :

Hii mate ,

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A decagon has 10 sides and sum of the exterior angles of decagon = 3600

∵Decagon is regular

Measuer of each exterior angle = 36010=360−−−−−−−(i)

A pentagon has five sides and sum of interior angles of a pentagon

= (5−2)×1800=3×1800=5400

As pentagon is regular so measure of each angle of the pentagon 

=54005=1080−−−−−(ii)

From (i) and (ii)

∴Measure of each exterior angle of a decagon=13Measure of each interior angle of a pentagon

Hence proved~~~~

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Hope it helps u !!!

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