Finding Missing Side Lengths with Given Perimeters

Front

What is perimeter?

Back

The distance around a shape.

Front

If a rectangle has a perimeter of 20 cm and one side is 5 cm, what is the length of the missing side?

Back

7.5 cm.

Front

If the perimeter of a square is 24 cm, what is the length of one side?

Back

6 cm.

Front

What does it mean if a shape has a 'missing side'?

Back

One side's length is not known.

Front

If a rectangle has a perimeter of 30 cm and one side is 10 cm, what could be the length of the opposite side?

Back

10 cm.

Front

If three sides of a rectangle are known (5 cm, 3 cm, and 5 cm), and the perimeter is 20 cm, what is the length of the missing side?

Back

3 cm.

Front

What is the formula for finding the perimeter of a rectangle?

Back

Perimeter = 2(length + width).

Front

If the perimeter of a triangle is 18 cm and two sides are 5 cm and 6 cm, what is the length of the missing side?

Back

7 cm.

Front

What is the perimeter of a rectangle with sides 4 cm and 6 cm?

Back

20 cm.

Front

If the perimeter of a square is 40 cm, what is the length of one side?

Back

10 cm.