Finding Radius or Diameter When Given Circumference

The ratio between a circle's circumference and ​ (a)   is ​ (b)  

• diameter

• radius

The circumference of a circle is 25.12 cm. What is the diameter to the nearest centimeter?

• 4 cm

• 8 cm

• 25 cm

• 75 cm

The distance around a circular dance hall room is 135 feet. Which of the following is closest to the longest distance across the dance hall?

• 19 feet

• 28 feet

• 36 feet

• 43 feet

How many cookies are there?

• 48 cookies

• 24 cookies

• 8 cookies

• 4 cookies

Find the radius if the circumference is 14.444

Find the diameter if the circumference is 166.42

Find the radius if the circumference is 102.05

Find the diameter if the circumference is 157

The circumference of this circle is 54 meters, approximately how long is the diameter?

• 27 meters

• 3.14 meters

• 9 meters

• 18 meters

If my circumference is 50.24ft, what is my radius?

• 8 ft

• 16 ft

• 25.12 ft

• 50.24 ft