FLASHCARD: Perimeter

Front

What is the perimeter?

Back

The perimeter is the total distance around the outside of a shape. It is calculated by adding the lengths of all the 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 perimeter of a square with a side length of 5 units?

Back

The perimeter of a square is calculated as P = 4 × side length. So, P = 4 × 5 = 20 units.

Front

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

Back

The perimeter of the triangle is the sum of its sides: 3 + 4 + 5 = 12 units.

Front

What is the perimeter of a shape with sides measuring 6, 8, and 10 units?

Back

The perimeter is calculated by adding the lengths of the sides: 6 + 8 + 10 = 24 units.

Front

How do you find the missing side of a rectangle if the perimeter is 30 units and one side is 10 units?

Back

Use the formula P = 2(length + width). If P = 30 and one side (length) is 10, then 30 = 2(10 + width). Solve for width.

Front

What is the perimeter of a regular hexagon with each side measuring 4 units?

Back

The perimeter of a regular hexagon is calculated as P = 6 × side length. So, P = 6 × 4 = 24 units.

Front

If a rectangle has a perimeter of 50 units and one side is 15 units, what is the other side?

Back

Use the formula P = 2(length + width). If P = 50 and length = 15, then 50 = 2(15 + width). Solve for width.

Front

What is the perimeter of a circle called?

Back

The perimeter of a circle is called the circumference.

Front

How do you calculate the circumference of a circle with a radius of 7 units?

Back

Use the formula C = 2πr. So, C = 2 × π × 7 ≈ 43.98 units.