Distance around a circle

Answer Key - Grade 7 Math Worksheet - Challenge Me

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

1. 1.

   Ren wraps ribbon once around a round plate. The ribbon is 59.66 cm long. The ribbon fit on the first try. What is the diameter in cm? Use π = 3.14. Do not round.

   19
2. 2.

   Zee wraps ribbon once around a round button. The ribbon is 3.768 cm long. What is the diameter in cm? Use π = 3.14. Do not round.

   1.2
3. 3.

   Ari's bike has a wheel 0.5 m across. The wheel makes 12 full turns without slipping. How far does it roll in meters? Use π = 3.14 and do not round.

   18.84
4. 4.

   Bo's scooter has a wheel 12 cm across. The wheel makes 25 full turns without slipping. How far does it roll in cm? Use π = 3.14 and do not round.

   942
5. 5.

   Luz's bike has a wheel 0.6 m across. It rolls 56.52 m without slipping. How many full turns does the wheel make? Use π = 3.14 and do not round.

   30
6. 6.

   Ren's half paper plate has a diameter of 23 cm. How far is it all the way around, curved edge plus straight edge? Use π = 3.14. Do not round.

   59.11
7. 7.

   Tala wraps ribbon once around a plate 21 cm across, plus 15 cm more to tie the bow. How long is the ribbon in cm? Use π = 3.14. Do not round.

   80.94
8. 8.

   Zee puts string lights once around a flower bed 5 m across, plus 2 m more to reach the plug. How long are the lights in meters? Use π = 3.14. Do not round.

   17.7
9. 9.

   Ari glues trim once around a hand mirror 11 cm across, plus 3 cm more to overlap at the ends. How long is the trim in cm? Use π = 3.14. Do not round.

   37.54
10. 10.

    Bo wraps ribbon once around a clock face 26 cm across, plus 12 cm more to tie the bow. How long is the ribbon in cm? Use π = 3.14. Do not round.

    93.64