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Question

What is the sum of the interior angles of a regular pentagon (regular polygon of 5 sides)?


A

180

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B

360

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C

540

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D

640

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Solution

The correct option is C

540


We have,

the sum of interior angles of a regular polygon of n sides = (n2)×180

The sum of interior angles of a regular pentagon = (52)×180 = 3×180 = 540


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