Perimeter

Front

What is the definition of perimeter?

Back

Perimeter is the total distance around the outside of a two-dimensional shape, calculated by adding the lengths of all its sides.

Front

How do you calculate the perimeter of a rectangle?

Back

To calculate the perimeter of a rectangle, use the formula P = 2(length + width).

Front

What is the formula for the perimeter of a square?

Back

The formula for the perimeter of a square is P = 4 × side length.

Front

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

Back

The perimeter of the triangle is 3 cm + 4 cm + 5 cm = 12 cm.

Front

What is the perimeter of a circle called?

Back

The perimeter of a circle is called the circumference.

Front

What is the formula for the circumference of a circle?

Back

The formula for the circumference of a circle is C = 2πr, where r is the radius.

Front

If the perimeter of a rectangle is 50 cm and the length is 15 cm, what is the width?

Back

The width can be found using the formula P = 2(length + width). Here, 50 = 2(15 + width), so width = 10 cm.

Front

What is the relationship between the sides of a rectangle and its perimeter?

Back

The perimeter of a rectangle increases as the lengths of its sides increase.

Front

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

Back

To find a missing side length, rearrange the perimeter formula to solve for the unknown side.

Front

What is the perimeter of a regular pentagon with each side measuring 6 cm?

Back

The perimeter of a regular pentagon is P = 5 × side length = 5 × 6 cm = 30 cm.