Circumference of Circles

Front

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

Back

Radius

Front

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

Back

9.5 inches

Front

Back

DC

Front

The radius of a circle is

Back

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

Front

What is the radius? Options: 18, 72, 38, 14

Back

18

Front

What is the circumference of this circle?

Back

37.68 cm

Front

Find the circumference (to the nearest whole number)

Back

88 in

Front

What is the formula for circumference of a circle given the diameter? Options: C = pi x r, C = pi x 2r, C = pi x D, C = pi x 2D

Back

C = pi x D

Front

The diameter of a bowl is 14 cm. What is the circumference of the bowl?

Back

43.96 cm

Front

Circumference of a circle with radius 4?

Back

8π or about 25.12