3rd Grade Perimeter

Front

What is the perimeter?

Back

The perimeter is the total distance around a shape.

Front

What is the formula to find the perimeter of a rectangle?

Back

P = 2(length + width) or P = length + length + width + width.

Front

If a square has sides of 5 cm, what is its perimeter?

Back

P = 5 + 5 + 5 + 5 = 20 cm.

Front

What do you do to find the perimeter of a shape?

Back

You add the lengths of all the sides together.

Front

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

Back

P = 3 + 4 + 5 = 12 cm.

Front

If the perimeter is 20 cm and one side is 5 cm, what is the total length of the other sides?

Back

The total length of the other sides is 20 cm - 5 cm = 15 cm.

Front

What is the perimeter of a rectangle with a length of 10 cm and a width of 4 cm?

Back

P = 2(10 + 4) = 28 cm.

Front

True or False: The perimeter can be found by multiplying the sides of a shape.

Back

False. You add the sides to find the perimeter.

Front

What is the perimeter of a square with a side length of 6 cm?

Back

P = 6 + 6 + 6 + 6 = 24 cm.

Front

If a shape has a perimeter of 30 cm and is made up of 4 equal sides, what is the length of each side?

Back

Each side is 30 cm ÷ 4 = 7.5 cm.