Pearson Geometry Common Core, 2011
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Pearson Geometry Common Core, 2011 View details
8. Perimeter, Circumference, and Area
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Exercise 8 Page 64

What is the formula to find the perimeter?

36 cm.

Practice makes perfect

Let's start by drawing rectangle ABCD with the given measurements, side s= 9cm.

The perimeter of a polygon is found by adding all of the side lengths. For square, we can shorten this formula quite a bit because every side has the same measure. P=4 s By substituting the side of the square into this formula, we can calculate the perimeter.
P=4s
P=4( 9cm)
P=36cm
The perimeter of the square is 36centimeters.