Area and circumference of Circles

Front

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

Back

9.5 inches

Front

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

Back

20ft

Front

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

Back

37.68 cm

Front

Find the circumference of a circle with a radius of 12.5 mm.

Back

78.5mm

Front

The radius of a circle is

Back

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

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

Is the red line a radius or diameter of the circle?

Back

Diameter

Front

What is π ?

Back

The ratio of the circumference of any circle to its diameter.

Front

Circumference of a circle is 25.12 inches. Find the diameter. Use π = 3.14.

Back

8 in.

Front

The circumference is 62.8 inches. What is the radius? (Use 3.14 for π)

Back

10 inches