Area of Squares and Rectangles

1. What is the perimeter of a rectangle of sides 4 cm by 3 cm?

model diagram
Perimeter of rectangle
=  4 cm  +  3 cm  +  4 cm  +  3 cm
=  14 cm

The perimeter of the rectangle is 14 cm.
The perimeter of a rectangle is the total distance around it.

2. What is the perimeter of a square of side 4 cm?

model diagram
Perimeter of square
=  4 cm  +  4 cm  +  4 cm  +  4 cm
=  16 cm

The perimeter of the square is 16 cm.
The perimeter of a square is the total distance around it.

3. Find the perimeter of each figure below.
What can you tell about their perimeter?

model diagram
The perimeter of a figure is the total distance around it.

Perimeter of figure A
=  1 cm  +  1 cm  +  1 cm  +  4 cm  +  2 cm  +  3 cm
=  12 cm

Perimeter of figure B
=  2 cm  +  1 cm  +  1 cm  +  2 cm  +  1 cm  +  1 cm  +  1 cm  +  1 cm  +  1 cm  +  1 cm
=  12 cm

The perimeter of each figure is 12 cm.
Two different figures can have the same perimeter.