Perimeter with Missing Sides

Front

What is perimeter?

Back

Perimeter is the total distance around the outside of a shape.

Front

How do you find the perimeter of a rectangle?

Back

Add the lengths of all four sides or use the formula: P = 2(length + width).

Front

If a rectangle has a length of 5 units and a width of 3 units, what is its perimeter?

Back

P = 2(5 + 3) = 16 units.

Front

What is the perimeter of a square with a side length of 4 units?

Back

P = 4 x 4 = 16 units.

Front

If the perimeter of a shape is 34 units and three sides are 10, 8, and 7 units, what is the missing side?

Back

The missing side is 9 units.

Front

What is the formula for the perimeter of a square?

Back

P = 4 x side length.

Front

If the perimeter of a rectangle is 26 units and one side is 10 units, what is the length of the other side?

Back

The other side is 3 units.

Front

What is the perimeter of a triangle with sides measuring 3, 4, and 5 units?

Back

P = 3 + 4 + 5 = 12 units.

Front

If the perimeter is 28 units and two sides of a rectangle are 10 units each, what is the length of the other two sides?

Back

The other two sides are 4 units each.

Front

What do you do if you know the perimeter but not all the side lengths?

Back

You can subtract the known side lengths from the total perimeter to find the missing side.