Answer:
The measure of radius c is 12.36 cm
C is correct.
Step-by-step explanation:
Given: A regular pentagon is shown in diagram.
As we know the sum of angle of pentagon is 540°
It is a regular pentagon. Therefore, each angle is equal.
OB would be angle bisector of angle B
Thus,
In triangle OBC, ∠C=90°
Hence, The measure of radius c is 12.36 cm
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