Question

find the number of light in a regular polygon if exterior angle is 2/5 of a right angle ​

Answer 1

Exterior Angle:-2/5×90

:-36°

Interior angle:-180°-36

:-144°

We need the nearest angle which is the sum of interior angle and it's once place is 0

144×5=720

This means that the number of angles is equal to the sides of pentagon.

Thus,It is pentagon

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