Advanced Circumference Problems

If you have the circumference of a circle, you can solve the diameter by doing what?

• divide the circumference by 2

• multiply the circumference by 2

• multiply the circumference by pi (3.14)

• divide the circumference by pi (3.14)

If you have the circumference of a circle is 149 ft., what is the radius of that circle?

• 47.45 ft

• 23.7 ft.

• 74.5 ft.

• None of the above

If you have the circumference of a circle is 35.8 in, what is the radius of that circle?

• 5.7 in

• 11.4 in

• 17.9 in

• 70.16 in

What does C represent in the formula: C = π·d

• Pi

• Circumference

• Diameter

• Area

What does d represent in the formula:

C = π·d

• diameter

• radius

• pi

• 3.14

Determine the radius of the penny

• 59.66 mm

• 9.5 mm

• 38 mm

• 119.32 mm

What is the radius?

• 18

• 72

• 38

• 14

What two formulas can you use to find the circumference?

• C = π·d

• C = π·r²

• C = 2·π·r

• C = d²

What number represents π?

• 31.4

• 4.13

• 3.14

• 34.1

Find the circumference with a diameter of 18.4 km. Use 3.14 for pi.

• 23.7 km

• 57.8 km

• 19.3 km

• 59.1 km