Distance around a circle

Answer Key - Grade 7 Math Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Kira's flower bed has a diameter of 4.5 m. The flowers are in a good mood. What is its circumference in meters? Use π = 3.14. Do not round.

   14.13
2. 2.

   Luz's button has a diameter of 1.5 cm. It is shy about its size. What is its circumference in cm? Use π = 3.14. Do not round.

   4.71
3. 3.

   Milo's dish has a diameter of 31 cm. It has seen many snacks. What is its circumference in cm? Use π = 3.14. Do not round.

   97.34
4. 4.

   Ren's clock face has a radius of 14.5 cm. It ticks very loudly. What is its circumference in cm? Use π = 3.14. Do not round.

   91.06
5. 5.

   Tala's pizza has a radius of 8.5 cm. It is a personal pizza with big plans. What is its circumference in cm? Use π = 3.14. Do not round.

   53.38
6. 6.

   Ari measures a round cookie: 15.6 cm around and 5 cm across. It was measured before it was eaten. What is the circumference divided by the diameter, to the nearest hundredth?

   3.12
7. 7.

   Esme measures a round cookie: 22 cm around and a radius of 3.5 cm. A crumb fell off. Just one. What is the circumference divided by the diameter, to the nearest hundredth?

   3.14
8. 8.

   Luz's clock face has a radius of 7.5 cm. It is five minutes fast. What is its circumference in terms of π? Write it like 14π.

   15π
9. 9.

   Noah's pizza has a radius of 9.5 cm. It has a lot of crust to measure. Which expression gives its circumference? Use π = 3.14. Do not round.

   • 2 × 3.14 × 9.5
   • 3.14 × 9.5 × 9.5
   • 2 × 3.14 × 19
   • 3.14 × 9.5
10. 10.

    Pia's plate has a diameter of 16.5 cm. It would like to be a frisbee. Which expression gives its circumference? Use π = 3.14. Do not round.

    • 3.14 × 16.5
    • 2 × 3.14 × 16.5
    • 3.14 × 8.25
    • 3.14 × 16.5 × 16.5