The area of a regular octagon is 35 cm squared what is the area of a regular octagon with sides five times as long

The answer would be 875cm squared

So first, you must use the area of an octagon formula to find the length of one side of the given octagon ...

A = 2 (1 + √2) s^2

35 = 2 (1 + √2) s^2

s = 2.57 cm

Next, you must use the area of an octagon formula to find the area of the second octagon by multiplying the side length above by five.

A = 2 (1 + √2) s^2

A = 2 (1 + √2) (2.57 • 5) ^2

A = 736.44 cm^2