Circumference

Front

What is the circumference of a circle?

Back

The distance around a circle.

Front

What is the diameter of a circle?

Back

A line through the center of a circle.

Front

How do you calculate the circumference of a circle?

Back

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

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius.

Front

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

Back

Circumference = 2 × π × 7 cm ≈ 43.98 cm.

Front

What is π (pi)?

Back

A mathematical constant approximately equal to 3.14, used in calculations involving circles.

Front

If the circumference of a circle is 31.4 cm, what is the diameter?

Back

Diameter = Circumference / π ≈ 10 cm.

Front

What is the area of a circle?

Back

Area = π × radius².

Front

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

Back

Circumference = π × 10 cm ≈ 31.4 cm.

Front

What is a chord in a circle?

Back

A line segment with both endpoints on the circle.