Circumference of a Circle

Front

What is the circumference of a circle?

Back

The circumference is the distance around a circle.

Front

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

Back

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

Front

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

Back

31.4 ft (using C = 2 × π × 5).

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

If the diameter of a circle is 10 ft, what is the radius?

Back

5 ft (radius is half of the diameter).

Front

What is the diameter of a circle?

Back

The diameter is the distance across the circle through its center, equal to twice the radius.

Front

How do you find the diameter if you are given the circumference?

Back

Divide the circumference by π (approximately 3.14).

Front

What is π (pi)?

Back

π is a mathematical constant approximately equal to 3.14, used in calculations involving circles.

Front

If the circumference of a circle is 62.8 ft, what is the radius?

Back

10 ft (using C = 2 × π × radius, solve for radius).

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the length of the radius.