Page 339 - Math Smart - 7

If the rectangle is a square, then both sides are the lengths.
The formula for the perimeter of a square then becomes as follows:
length (/)
Perimeter of a square = length + length + length + length
=/+/+/+/
length (/)
= 4 X /
= 4/

Check My

Understanding

O Calculate the perimeter and area of each rectangle.

12 cm
Perimeter =
5 cm
Area =

b) cm
3 m
Perimeter
Area =

23 mm

Perimeter
23 mm
Area -

120 mm
d)
Perimeter =
7 cm
Area =

4 cm

e)
Perimeters
cm
Area =