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Question

The measure of each interior angle of a regular polygon is five times the measure of its exterior angle. Find the number of sides in the polygon

A
12
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B
18
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C
24
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D
36
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Solution

The correct option is C 12
Given the measure of each interior angle of a regular polygon is five times the measure of its exterior angle.
Each interior angle of a regular polygon = 180o(n2)n where n = number of sides of polygon
Each exterior angle of a regular polygon = 360on
According to question,
180o(n2)n=5×360on
=>n2=10
=>n=12
Number of sides of the polygon =12

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