Circumference

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle.

Front

What is the formula to calculate the circumference of a circle?

Back

Circumference = π × diameter or Circumference = 2 × π × radius.

Front

What is π (pi)?

Back

π (pi) is a mathematical constant approximately equal to 3.14.

Front

If the diameter of a circle is 10 cm, what is its circumference?

Back

Circumference = π × diameter = 3.14 × 10 cm = 31.4 cm.

Front

What is the diameter of a circle?

Back

The diameter is a line segment that passes through the center of the circle, connecting two points on its circumference.

Front

How do you find the radius of a circle?

Back

The radius is half of the diameter.

Front

If the radius of a circle is 5 cm, what is its circumference?

Back

Circumference = 2 × π × radius = 2 × 3.14 × 5 cm = 31.4 cm.

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the length of the radius.

Front

What is the circumference of a circle with a radius of 7 cm?

Back

Circumference = 2 × π × 7 cm = 43.96 cm.

Front

What is the area of a circle?

Back

Area = π × radius².