Page 70 - SPARK OF MATH book 4

(4-2) Measuring Perimeter.

Presenting a Perimeter Calculating a Perimeter Formula

A perimeter is the To find the perimeter add
distance around a figure. the length of each side

together. a a c c
m
2 2 m
b b
m
1 1 m

P= 1+1+2+2= 6 m P= a+b+c
P= a+b+c
P= 1+1+2+2= 6 m

A perimeter is measured in units of lengths such as
centimeters, meters, kilometers, etc.

Find the perimeter of each shape.

9 mm 9 mm
4 cm 5 dm
7 dm 7 dm
9 mm
6 cm
5 cm
9 mm
8 dm 8 dm

4+5+6= 15 cm
4+5+6= 15 cm

12 m
4 m 6 cm 3 cm
10 m 10 m 2 m 3 m 4 cm 4 cm

12 m 4 m 8 cm

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