Find the area of the regular polygon with a side length of 20

The area of regular polygon with 5 sides is 689.65m²

Explanation:

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 length of any side

n  is the number of sides

tan  is the tangent function calculated in degrees

Let the number of side of a polygon be 5. So, putting the values in equation

Therefore, the area of regular polygon with 5 sides is 689.65m²

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.