If you know the circumference of a circle, what is the correct way to find its diameter?

Multiply the circumference by $\pi$.

Divide the circumference by $\pi$.

Multiply the circumference by 2.

Circles and Circumference Practice — Grade 7 math

1. A circular pond has a circumference of 942 feet. Using the approximation $\pi \approx 3.14$, what is the diameter of the pond in feet? The diameter is ___ feet.
2. If you know the circumference of a circle, what is the correct way to find its diameter?
- A. Multiply the circumference by $\pi$.
- B. Divide the circumference by $\pi$.
- C. Multiply the circumference by 2.
- D. Divide the circumference by 2.
3. The circumference of a bicycle tire is 62.8 inches. Using $\pi \approx 3.14$, find the diameter of the tire in inches. The diameter is ___ inches.
4. A circular tabletop has a circumference of 157 centimeters. Using the approximation $\pi \approx 3.14$, calculate the diameter of the tabletop. The diameter is ___ centimeters.
5. A circular rug has a circumference of approximately 88 feet. Using $\pi \approx 3.14$, what is the best estimate for the diameter of the rug?
- A. 14 feet
- B. 28 feet
- C. 44 feet
- D. 276 feet
6. A circular garden has a diameter of 12 feet. What is its circumference?
- A. $6\pi$ feet
- B. $12\pi$ feet
- C. $24\pi$ feet
- D. $144\pi$ feet
7. The circumference of a bicycle wheel is $25\pi$ inches. What is the diameter of the wheel in inches? ___ inches
8. A circle has a circumference of $18\pi$ yards. What is its radius?
- A. 9 yards
- B. 18 yards
- C. 36 yards
- D. $9\pi$ yards
9. If a circle's radius is 15 centimeters, its diameter is ___ centimeters.