Question

formula of area of a simple pentagon​

Answer 1

Answer:

Area and perimeter of a regular pentagon

area = a² * √(25 + 10√5) / 4 , where a is a side of a regular pentagon. Also, you can find the area having the inscribed circle radius: area = 5 * r² * √[(5 + √5)/2] / 4 , where r is an incircle radius.

Step-by-step explanation:

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Answer 2

PA/2 is the formula of the area of a regular Pentagon.