Question

Find perimeter?

Answer 1

`P=80cm`

Explanation:

The perimeter is the sum of all the sides - the distance around the shape.

Count how many sides there are .... `rarr6`

But there are two sides without lengths shown. Find these first.

The vertical length on the left is `19cm`

On the right side, there is a vertical length of `6cm`

The unknown vertical length is `19-6 = 13cm`

The horizontal line at the bottom is `21cm`
The horizontal line at the top is `10cm`

The missing horizontal distance is `21-10 = 11cm`

Now you have the lengths of all `6` sides, so just add them all together.

`P = 19+10+13+11+6+21 = 80cm`