Circle Area and Circumference Quiz
Make a circles quiz: circumference and area in terms of π from a radius or a diameter, answers to 1 decimal place, and finding the radius from the area.
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Preview: 10 questions
1. A circle has a radius of 8 cm. What is its circumference? Give the answer in terms of π.
2. A circle has a diameter of 4 m. What is its circumference? Give the answer in terms of π.
3. A circle has a radius of 5 cm. What is its circumference? Give the answer in terms of π.
4. A circle has a radius of 9 m. What is its circumference? Give the answer in terms of π.
5. A circle has a diameter of 18 cm. What is its circumference? Give the answer in terms of π.
6. A circle has a diameter of 10 cm. What is its circumference? Give the answer in terms of π.
7. A circle has a radius of 2 m. What is its circumference? Give the answer in terms of π.
8. A circle has a radius of 6 m. What is its circumference? Give the answer in terms of π.
9. A circle has a diameter of 16 m. What is its circumference? Give the answer in terms of π.
10. A circle has a diameter of 4 m. What is its circumference? Give the answer in terms of π.
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How it works
How the Circle Area and Circumference Quiz works
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Choose the skills to practise, how hard, and how many questions.
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Try it here
The quiz appears as you choose. Answer a few and check them to see the worked solutions.
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Create the Room
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Worked example
What it makes
Three questions from a easier quiz on circle area and circumference, with the answers and worked solutions the quiz shows after checking.
1. A circle has a radius of 8 cm. What is its circumference? Give the answer in terms of π.
Options: 8π cm · 16π cm · 64π cm · 32π cm
Answer: 16π cm
Circumference = 2 × π × radius = 2 × π × 8 = 16π cm.
2. A circle has a diameter of 4 m. What is its circumference? Give the answer in terms of π.
Options: 5π m · 4π m · 2π m · 8π m
Answer: 4π m
Circumference = π × diameter = π × 4 = 4π m.
3. A circle has a radius of 5 cm. What is its circumference? Give the answer in terms of π.
Options: 20π cm · 10π cm · 25π cm · 5π cm
Answer: 10π cm
Circumference = 2 × π × radius = 2 × π × 5 = 10π cm.
Who it's for
Who uses it
Maths teachers
Practice on both circle formulas side by side.
Learners
Stop mixing up 2πr and πr².
Tutors
Catch learners who use the diameter as the radius.
Good to know
What to consider
- Answers in terms of π look like 25π cm²; decimal answers use the full value of π and round to 1 decimal place.
- Level 1 is circumference, level 2 adds area, level 3 uses decimals and works backwards from the area.
- Levels are difficulty bands, not school grades or a curriculum.
Questions
About the Circle Area and Circumference Quiz
Does it use 3.14 for π?
No. Decimal answers use the full value of π and round at the end, as a calculator would.
How do I know the answers are right?
The questions are computed, not written by AI: each answer is worked out with exact arithmetic and checked again by a separate solver in our tests. Every question shows its worked solution after the learner checks their answers.
Can my students use it without an account?
Yes. Publish the Room and share the link: anyone with it can take the quiz, check their answers and read the worked solutions. You need a free account to keep and publish the Room.
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