Circumference and area of a circle

12

A circle has a circumference of 12π. What is its diameter?

24

A circle has a circumference of 24π. What is its diameter?

12

A circle has a circumference of 24π. What is its radius?

157.08

A circular rug has a diameter of 50 units. What is the distance around the rug to the nearest hundredth?

18.8

A toy train travels around a Christmas tree in a circle. The train track measures 6 feet in diameter. What is the distance (in feet) that the train travels to the nearest tenth?

25.13

A tree is sold based on the circumference of the tree. If a tree has a radius of 4 inches, then what is the circumference (in feet) of the tree to the nearest hundredth?

28π

Find the circumference of a circle with a diameter of 28 in. in terms of pi

pi

On ANY circle, the (Circumference ÷ Diameter) = ______

78.5

The diameter is 10. What is the area of this circle? Use 3.14 for pi.

200.96

The diameter is 16. What is the area of this circle? Use 3.14 for pi.

55.4

The diameter is 8.4. What is the area of this circle? Round your answer to the nearest tenth.

8π

What is the distance around a circle with a radius of 4 in terms of pi.

18.85

Find the circumference of a circle with a radius of 3 miles to the nearest hundredth

12.57

Green Reservoir is in the shape of a circle. If the distance across the reservoir is 4 miles, what is the distance around the Reservoir to the nearest hundredth?

circumference

The distance around a circle. Also known as the perimeter of a circle.

diameter

The distance shown is called the ________.

radius

The distance shown is called the ________.

4.41π

The radius is 2.1. What is the area of this circle in terms of pi?

50.2

The radius is 4 of a circle is 4. How much space does the circle take up? Round your answer to the nearest tenth. Use 3.14 for pi.

105.7

The radius is 5.8. What is the area of this circle? Round your answer to the nearest tenth.

49π

The radius is 7. What is the area of this circle in terms of pi?

81π

The radius is 9. What is the area of this circle in terms of pi?

445

The radius of a circular table top is 11.9 ft. How much feet of table fabric would you need to cover the table top? Round your answer to the nearest whole number.

3.14 = circumference/diameter

What is the relationship between the circumference and diameter?