If the interior angle of a regular polygon is 108°.The polygon has how many sides?
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Given:
The measure of interior angle of a regular polygon is 108°.
To Find:
The number of sides of the polygon.
Solution:
1. It is given that the measure of interior angle of a regular polygon is 108°.
2. According to the properties of geometry, the sum of interior angles of a polygon is equal to [(n-2)180°]/n
=> Sum of interior angles = [(n-2)180°]/n,
=> 108n = 180n - 360, ( Simplify the equation to find the value of n )
=> 180n - 108n = 360,
=> 72n = 360,
=> n = 360/72,
=> n = 5.
3. The polygon has 5 sides.
Therefore, the total sides of the polygon is 5, the polygon with 5 sides is known as pentagon.
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