Geometry

Perimeter

The perimeter of a figure is the total distance around all sides of the figures.

Look at this square.

Each side is 3 cm long.

What is the total length of the square?

3cm + 30m + 3cm + 3cm = 12cm

The total length of the square is 12 cm.

This is called the perimeter of the square.

To find the perimeter:

1) Look at the length of each side of the figure.

2) Add all the lengths.

Find the perimeter of the triangle

3cm + 3cm + 3cm = 9cm

The perimeter of triangle is 9 cm

Find the perimeter of the rectangle.

2cm + 2cm + 4cm + 4cm = 12cm

The perimeter of rectangle is 12 cm

Look at this square.

2cm + 2cm + 2cm + 2cm = 8cm

The perimeter of square is 8 cm