What is the area of the regular pentagon below

688.2 ft

850.7 ft

951.1 ft

1,376.4 ft

A

Step-by-step explanation:

By definition, all sides of a regular polygon are equal in length. If you know the length of one of the sides, the area is given by the formula:

where s is the side length, n is the number of sides.

In your case, s=20 ft, n=5,so

For this case we have that by definition, the polygon area shown is given by:

Where:

p: It is the perimeter

a: It is the apothem

So, the perimeter is:

On the other hand, the apothem is given by:

Finally, the area is:

Rounding off we have:

Option A

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step-by-step explanation:

step-by-step explanation:

5×5×5+2(8)÷2(2)+3(3)

15+16÷4+9

31÷13

do 31÷13 and u will get ur answer