Perimeter of rectangle 8 cm by 5 cm

Step by step

The question

Question: find the perimeter of a rectangle 8 cm long and 5 cm wide.

1 Find every side

The perimeter is the way all around the edge.

We add every side.

The top is the same as the bottom: 8 cm.

The right side is the same as the left: 5 cm.

2 Add all the sides

Walk around and add: 8 + 5 + 8 + 5.

8 plus 5 is 13.

The other two sides make 13 too.

13 plus 13 is 26.

So the perimeter is 26 cm.

Let's look back.

First: find every side.

Last: add all the sides.