Perimeter of irregular shapes

Front

What is perimeter?

Back

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

Front

How do you find the perimeter of an irregular shape?

Back

To find the perimeter of an irregular shape, add the lengths of all its sides together.

Tags

CCSS.3.MD.D.8

Front

If a shape has sides measuring 5 cm, 7 cm, and 3 cm, what is the perimeter?

Back

The perimeter is 5 cm + 7 cm + 3 cm = 15 cm.

Tags

CCSS.3.MD.D.8

Front

What is a missing side in a shape?

Back

A missing side is a side length that is not given but can be calculated using the perimeter.

Tags

CCSS.3.MD.D.8

Front

If the perimeter of a rectangle is 20 cm and one side is 6 cm, what is the other side?

Back

The other side is 20 cm - 6 cm - 6 cm = 8 cm.

Tags

CCSS.4.MD.A.3

Front

What is the formula for the perimeter of a rectangle?

Back

The formula is P = 2(length + width).

Tags

CCSS.4.MD.A.3

Front

If a triangle has sides of 3 cm, 4 cm, and 5 cm, what is the perimeter?

Back

The perimeter is 3 cm + 4 cm + 5 cm = 12 cm.

Tags

CCSS.3.MD.D.8

Front

What do you do if you have a shape with one missing side?

Back

You can find the missing side by subtracting the known sides' lengths from the total perimeter.

Tags

CCSS.3.MD.D.8

Front

If a shape has a perimeter of 30 cm and three sides are 10 cm, 8 cm, and 5 cm, what is the missing side?

Back

The missing side is 30 cm - (10 cm + 8 cm + 5 cm) = 7 cm.

Tags

CCSS.3.MD.D.8

Front

What is an irregular shape?

Back

An irregular shape is a shape that does not have equal sides or angles.

Tags

CCSS.2.G.A.1

CCSS.1.G.A.1