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Circumference - Worksheet 10 - 7th Grade

Hard

Use radius and diameter correctly and leave circle measurements exact in terms of π.

hard: Use another set to practice explaining and checking your answers.

23 problems · 15-20 minutes · Skills: geometry, circles, formulas

About This Worksheet

This hard-level worksheet contains 23 problems designed for 7th Grade students practicing circumference. Hard worksheets feature challenging problems including multi-step questions, missing values, and real-world applications to push students further.

Read labeled dimensions and coordinates. Recall multiplication facts and length units.

  • Use radius and diameter correctly and leave circle measurements exact in terms of π.
  • Check your result using the method in the example before moving to the next question.

How to Solve: Worked Example

Example Problem: A circle has radius 7 cm. Find its circumference in terms of π.
Solution Steps:
  1. Radius is 7 cm.
  2. Use C = 2πr.
Answer: 14π cm
Tip: Check your result using the method in the example before moving to the next question.
1
A circle has radius 4 cm. Find its circumference in terms of π.
2
A circle has diameter 6 cm. Find its circumference in terms of π.
3
A circle has radius 10 cm. Find its circumference in terms of π.
4
A circle has diameter 2 cm. Find its circumference in terms of π.
5
A circle has radius 1 cm. Find its circumference in terms of π.
6
A circle has diameter 4 cm. Find its circumference in terms of π.
7
A circle has radius 13 cm. Find its circumference in terms of π.
8
A circle has diameter 18 cm. Find its circumference in terms of π.
9
A circle has radius 3 cm. Find its circumference in terms of π.
10
A circle has diameter 12 cm. Find its circumference in terms of π.
11
A circle has radius 9 cm. Find its circumference in terms of π.
12
A circle has diameter 14 cm. Find its circumference in terms of π.
13
A circle has radius 5 cm. Find its circumference in terms of π.
14
A circle has diameter 8 cm. Find its circumference in terms of π.
15
A circle has radius 7 cm. Find its circumference in terms of π.
16
A circle has diameter 16 cm. Find its circumference in terms of π.
17
A circle has radius 2 cm. Find its circumference in terms of π.
18
A circle has diameter 30 cm. Find its circumference in terms of π.
19
A circle has radius 11 cm. Find its circumference in terms of π.
20
A circle has diameter 10 cm. Find its circumference in terms of π.
21
A circle has radius 15 cm. Find its circumference in terms of π.
22
A circle has diameter 26 cm. Find its circumference in terms of π.
23
A circle has radius 6 cm. Find its circumference in terms of π.

Answer Key

1. 8π cm2. 6π cm3. 20π cm4. 2π cm5. 2π cm6. 4π cm7. 26π cm8. 18π cm9. 6π cm10. 12π cm11. 18π cm12. 14π cm13. 10π cm14. 8π cm15. 14π cm16. 16π cm17. 4π cm18. 30π cm19. 22π cm20. 10π cm21. 30π cm22. 26π cm23. 12π cm

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What skills does this geometry worksheet cover?

This worksheet focuses on geometry, circles, formulas. It is designed for 7th Grade students and provides structured practice through varied problem types with a worked example to guide students before they begin.

Can I use this worksheet in my classroom?

Yes. All worksheets on K12Worksheets are free for classroom use. You can print copies for your entire class. With 10 worksheets per subtopic at three difficulty levels, you have plenty of options for differentiated instruction and individualized practice.

How many problems are on this worksheet?

This worksheet contains 23 problems. It typically takes 15-20 minutes to complete. An answer key with all solutions is included so parents and teachers can check work quickly.