Area and Circumference of Circles

Front

The radius of a circle is

Back

The measurement from the center of a circle to an edge of the circle.

Front

Which segment is the diameter? Options: AC, BD, LM, CE

Back

BD

Front

Circumference

Back

The distance around a circle.

Front

Does this picture show the diameter or radius of a circle?

Back

Radius

Front

How can you calculate the radius if you are given the diameter? Options: Multiply the diameter by 2, Divide the diameter by 2, Add 2 to the diameter, Subtract 2 from the diameter

Back

Divide the diameter by 2

Front

If my radius is 10 ft, what is my diameter?

Back

20ft

Front

If my diameter is 19 inches, what is my radius?

Back

9.5 inches

Front

Jayne has a circular lollipop with a circumference of 25.12 inches. What is the diameter? Use π = 3.14. Options: 4 in., 8 in., 12 in., 16 in.

Back

8 in.

Front

A Circle has a radius of 4. What is the circumference of the circle?

Back

8π or about 25.12

Front

What is the circumference of this circle? Options: 3.14 cm, 37.68 cm, 24 cm, 68.4 cm

Back

37.68 cm