Perimeter flashcard

Front

What is the perimeter?

Back

The 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 units?

Back

P = 4 x 5 = 20 units.

Front

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

Back

P = 3 + 4 + 5 = 12 units.

Front

What is the perimeter of a rectangle with a length of 10 units and a width of 6 units?

Back

P = 2(10 + 6) = 32 units.

Front

What is the perimeter of a shape with sides measuring 2, 3, 4, and 5 units?

Back

P = 2 + 3 + 4 + 5 = 14 units.

Front

How do you find the missing side of a shape if you know the perimeter?

Back

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

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

C = 2πr, where r is the radius.

Front

If the radius of a circle is 7 units, what is its circumference?

Back

C = 2π(7) ≈ 43.98 units.