Finding Radius or Diameter with Circumference Given

Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the diameter of Jayne’s lollipop be? Use π = 3.14.

• 4 in.

• 8 in.

• 12 in.

• 16 in.

The circumference is 62.8 inches. What is the radius?

• 20 inches

• 10 inches

• 6.28 inches

• 31.4 inches

If the area of a circle is 78.5 in² , then the diameter is?

• 10 in

• 5 in

• 25 in

• pi in

If the circumference of a circle is 69.08 ft, what is the radius?

• 22 ft

• 11ft

• π ft

• no ft

If the circumference of a circle is 44 π feet, what is the radius?

• 22 ft

• 44 ft

• 33 feet

• 3.14 feet

If the area of circle is 314 , find the radius of the circle.

• 10 π

• 10

• 50

• 50 π

The Circumference of a circle is 62.8 mi. Find the diameter of the circle. Use 3.14 for π and round to the nearest tenth.

• r = 3

• r = 10

• r = 20

• r = 31.4

The Circumference of a circle is 12.6 yd. Find the radius of the circle. Use 3.14 for π and round to the nearest tenth.

• r = 2

• r = 4

• r = 6.3

• r = 25.2

Find the circumference of each circle when given the area.

area = 64π mi²

• C = 32 mi

• C = 42.5 mi

• C = 50.3 mi

• C = 64 mi

Find the area of the circle when given the circumference.

Circumference = 18.84 yd

• 6 yd

• 19 yd

• 28.3 yd

• 36 yd