Question

Math's the devil but help plz

Answer 1

Using the apothem, a, and the perimeter, p, the area, A, of a regular polygon is


`A = (pa)/(2)`

You need to calculate the area of the octagon and subtract the area of the square.
The perimeter is 8 times the side.


`A = (pa)/(2) - s^2`


`A = (8 * 13 * 15.69)/(2) - 13^2`


`A = 815.88 - 169`


`A = 646.88`