# Solution: Determine the area inside and concentric to the larger pentagon

(Last Updated On: January 17, 2023)

#### Problem Statement: EE Board March 1998

A regular pentagon has sides of 20 cm. An inner pentagon with sides of 10 cm is inside and concentric to the large pentagon. Determine the area inside and concentric to the larger pentagon but outside of the smaller pentagon.

• A. 430.70 cm^3
• B. 573.26 cm^3
• C. 473.77 cm^3
• D. 516.14 cm^3

The area inside and concentric to the larger pentagon but outside of the smaller pentagon is 516.14 sq. cm .

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