Circumference of Circles

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A circle has a circumference of 314 units. What is its diameter?

100

The radius is 5.8. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

105.6

The radius is 6. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

113.0

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

12

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

12

Green Reservoir is in the shape of a circle. If the distance across the reservoir is 4 miles, what is the circumference?

12.56

The diameter is 12.8. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

128.6

The radius is 2.1. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

13.8

The radius is 7. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

153.9

A circle has a diameter of 50 units. What is the circumference?

157

The radius is 7.3. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

167.3

The diameter is 15. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

176.6

A play 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?

18.84

Find the circumference of a circle with a radius of 3 miles

18.84

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

2

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

24

A circle has a circumference of 6π. What is its radius?

3

A circle has a radius of 50 units. What is the circumference?

314

Find the circumference of a circle with a diameter of 11

34.54

The diameter is 23. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

415.3

The radius is 3.7. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

43.0

Find the circumference of a circle with a radius of 7

43.96

The radius is 11.9. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

444.7

A circle has a circumference of 314 units. What is its radius?

50

The radius is 4. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

50.2

The diameter is 8.4. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

55.4

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

6

The diameter is 10. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

78.5

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

87.92

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

circumference

The distance from the edge of the circle, through the center, to the other edge. It is twice the radius.

diameter

The distance shown is called the ________.

diameter

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

pi

The distance from the center of a circle to the edge of the circle. It is half of the diameter.

radius

The distance shown is called the ________.

radius

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?

25.12

Find the circumference of a circle with a radius of 4

25.12

The radius is 9. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

254.3

The diameter is 18. What is the area of this circle? Round your answer to the nearest tenth. Use 3.14 for pi.

254.34

A circle has a circumference of 6π. What is its diameter?

6


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