Perimeter - 3rd grade

Front

What is perimeter?

Back

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

Front

How do you calculate the perimeter of a rectangle?

Back

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

Front

What is the perimeter of a square with each side measuring 5 cm?

Back

20 cm (P = 4 x side length).

Front

If a triangle has sides measuring 3 cm, 4 cm, and 5 cm, what is its perimeter?

Back

12 cm (3 + 4 + 5 = 12).

Front

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

Back

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

Front

If a shape has a perimeter of 30 cm and one side is 10 cm, what is the total length of the other sides?

Back

20 cm (30 - 10 = 20).

Front

What is the perimeter of a polygon with sides measuring 6 in, 8 in, and 5 in?

Back

19 in (6 + 8 + 5 = 19).

Front

How do you find the missing side length if the perimeter is known?

Back

Subtract the sum of the known sides from the total perimeter.

Front

What is the perimeter of a square with a side length of 7 feet?

Back

28 feet (P = 4 x 7).

Front

If a rectangle has a perimeter of 24 cm and one side is 8 cm, what is the other side?

Back

4 cm (P = 2(length + width) => 24 = 2(8 + width)).