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Question

If the ratio of the measure of an internal angle to that of an external angle of a polygon is 3:2, then find the measure of an exterior angle.



A

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B

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C

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D

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Solution

The correct option is D


Measure of interior angle of an `n' sided regular polygon = (n2)180n

Measure of exterior angle of an `n' sided regular polygon = 2×180n

Given that ratio of internal to external angle is 3 : 2 -

(n22) = 32

n = 5

Measure of an exterior angle is 72.


Quantitative Aptitude

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