Question

Someone please answer and explain this for me!

Answer 1

Hello! Take a look at the picture I have included. There are a few steps you need to take. First look at the picture I included and notice the green rectangle? First get the perimeter of the rectangle. Next notice on each side of the rectangle there are half circles but if we combine those two half circles, we get one whole circle. So, we need to get the perimeter of a circle. Once we have the perimeter of the rectangle and the circle, just add them together to get the exact perimeter. To get an estimate, just use the perimeter of the rectangle.

--------------------------------------------------------------------------------------

Perimeter of the Rectangle:

W = width = 9

L = Length = 15

P = 2L + 2W

P = 2(15) + 2(9) = 48

Perimeter of Circle:

d = diameter = 9

$P = \pi d$

$P = \pi 9$ = 28.27

--------------------------------------------------------------------------------------

The exact perimeter = 48 + 28.27 = 76.27

Estimate perimeter = rectangle perimeter = 48