10-1 Circumference

Front

What is the formula for calculating the circumference of a circle?

Back

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

Front

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

Back

20 ft.

Front

What is the radius of a circle with a diameter of 19 inches?

Back

9.5 inches.

Front

What is the relationship between diameter and radius?

Back

Diameter is twice the radius (Diameter = 2 × radius).

Front

What is the diameter of a circle with a circumference of approximately 30 feet?

Back

9.55 feet.

Front

How do you find the radius from the circumference?

Back

Radius = Circumference / (2 × π).

Front

What is the diameter of a circle with a radius of 4 mi?

Back

8 mi.

Front

What does the term 'circumference' refer to?

Back

The measurement around the circle.

Front

If the circumference of a circle is 12.6 mi, what is the radius?

Back

2 mi.

Front

What is the distance from the center of a circle to an edge called?

Back

Radius.