area and circumference

Front

What is circumference?

Back

The distance around a circle.

Front

What is the formula for the circumference of a circle?

Back

Circumference = π × diameter.

Front

What is the diameter of a circle?

Back

A line from side to side passing through the center.

Front

What is a radius?

Back

A line from the center to the side of the circle.

Front

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

Back

5 ft.

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × radius.

Front

How do you calculate the area of a circle?

Back

Area = π × radius².

Front

What is the area of a circle with a radius of 3 ft?

Back

Area = 28.26 ft² (using π ≈ 3.14).

Front

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

Back

Diameter = 10 m (using π ≈ 3.14).

Front

What is the approximate value of π?

Back

π ≈ 3.14.