Small practice. Bright discoveries.Explore the free starter collection
worksheetstudio.
Sign in
Back to worksheets
MathsAges 16-18

Circle circumference & area

Use π ≈ 3.14 and radius r to calculate the circumference or area of a circle. Review suitability for your learners before teaching.

New variationTry interactive challengeBrowse templates
Age band:Ages 13-15Ages 16-18

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 16-18

Circle circumference & area

Take your time. Show your thinking.

  1. 1. A circle has radius 9 cm. Using π = 3.14, find its circumference.

    9 cm · 3.14 · Circle circumference & area

  2. 2. A circle has radius 5 cm. Using π = 3.14, find its area.

    5 cm · 3.14 · Circle circumference & area

  3. 3. A circle has radius 8 cm. Using π = 3.14, find its area.

    8 cm · 3.14 · Circle circumference & area

  4. 4. A circle has radius 16 cm. Using π = 3.14, find its area.

    16 cm · 3.14 · Circle circumference & area

  5. 5. A circle has radius 13 cm. Using π = 3.14, find its area.

    13 cm · 3.14 · Circle circumference & area

  6. 6. A circle has radius 2 cm. Using π = 3.14, find its circumference.

    2 cm · 3.14 · Circle circumference & area

  7. 7. A circle has radius 17 cm. Using π = 3.14, find its area.

    17 cm · 3.14 · Circle circumference & area

  8. 8. A circle has radius 10 cm. Using π = 3.14, find its circumference.

    10 cm · 3.14 · Circle circumference & area

  9. 9. A circle has radius 19 cm. Using π = 3.14, find its area.

    19 cm · 3.14 · Circle circumference & area

  10. 10. A circle has radius 5 cm. Using π = 3.14, find its circumference.

    5 cm · 3.14 · Circle circumference & area

  11. 11. A circle has radius 3 cm. Using π = 3.14, find its area.

    3 cm · 3.14 · Circle circumference & area

  12. 12. A circle has radius 14 cm. Using π = 3.14, find its circumference.

    14 cm · 3.14 · Circle circumference & area
12 questions · Seed 63 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 16-18

Circle circumference & area

Answers and reasoning. Review before teaching.

  1. 1. A circle has radius 9 cm. Using π = 3.14, find its circumference.

    56.52 cm

    Circumference C = 2πr = 2 × 3.14 × 9 = 56.52 cm.

  2. 2. A circle has radius 5 cm. Using π = 3.14, find its area.

    78.5 cm²

    Area A = πr² = 3.14 × 5² = 78.5 cm².

  3. 3. A circle has radius 8 cm. Using π = 3.14, find its area.

    200.96 cm²

    Area A = πr² = 3.14 × 8² = 200.96 cm².

  4. 4. A circle has radius 16 cm. Using π = 3.14, find its area.

    803.84 cm²

    Area A = πr² = 3.14 × 16² = 803.84 cm².

  5. 5. A circle has radius 13 cm. Using π = 3.14, find its area.

    530.66 cm²

    Area A = πr² = 3.14 × 13² = 530.66 cm².

  6. 6. A circle has radius 2 cm. Using π = 3.14, find its circumference.

    12.56 cm

    Circumference C = 2πr = 2 × 3.14 × 2 = 12.56 cm.

  7. 7. A circle has radius 17 cm. Using π = 3.14, find its area.

    907.46 cm²

    Area A = πr² = 3.14 × 17² = 907.46 cm².

  8. 8. A circle has radius 10 cm. Using π = 3.14, find its circumference.

    62.8 cm

    Circumference C = 2πr = 2 × 3.14 × 10 = 62.8 cm.

  9. 9. A circle has radius 19 cm. Using π = 3.14, find its area.

    1133.54 cm²

    Area A = πr² = 3.14 × 19² = 1133.54 cm².

  10. 10. A circle has radius 5 cm. Using π = 3.14, find its circumference.

    31.4 cm

    Circumference C = 2πr = 2 × 3.14 × 5 = 31.4 cm.

  11. 11. A circle has radius 3 cm. Using π = 3.14, find its area.

    28.26 cm²

    Area A = πr² = 3.14 × 3² = 28.26 cm².

  12. 12. A circle has radius 14 cm. Using π = 3.14, find its circumference.

    87.92 cm

    Circumference C = 2πr = 2 × 3.14 × 14 = 87.92 cm.

12 questions · Seed 63 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 16-18

Circle circumference & area

Take your time. Show your thinking.

  1. 1. A circle has radius 9 cm. Using π = 3.14, find its circumference.

    9 cm · 3.14 · Circle circumference & area

  2. 2. A circle has radius 5 cm. Using π = 3.14, find its area.

    5 cm · 3.14 · Circle circumference & area

  3. 3. A circle has radius 8 cm. Using π = 3.14, find its area.

    8 cm · 3.14 · Circle circumference & area

  4. 4. A circle has radius 16 cm. Using π = 3.14, find its area.

    16 cm · 3.14 · Circle circumference & area

  5. 5. A circle has radius 13 cm. Using π = 3.14, find its area.

    13 cm · 3.14 · Circle circumference & area

  6. 6. A circle has radius 2 cm. Using π = 3.14, find its circumference.

    2 cm · 3.14 · Circle circumference & area

  7. 7. A circle has radius 17 cm. Using π = 3.14, find its area.

    17 cm · 3.14 · Circle circumference & area

  8. 8. A circle has radius 10 cm. Using π = 3.14, find its circumference.

    10 cm · 3.14 · Circle circumference & area

  9. 9. A circle has radius 19 cm. Using π = 3.14, find its area.

    19 cm · 3.14 · Circle circumference & area

  10. 10. A circle has radius 5 cm. Using π = 3.14, find its circumference.

    5 cm · 3.14 · Circle circumference & area

  11. 11. A circle has radius 3 cm. Using π = 3.14, find its area.

    3 cm · 3.14 · Circle circumference & area

  12. 12. A circle has radius 14 cm. Using π = 3.14, find its circumference.

    14 cm · 3.14 · Circle circumference & area
12 questions · Seed 63 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 16-18

Circle circumference & area

Answers and reasoning. Review before teaching.

  1. 1. A circle has radius 9 cm. Using π = 3.14, find its circumference.

    56.52 cm

    Circumference C = 2πr = 2 × 3.14 × 9 = 56.52 cm.

  2. 2. A circle has radius 5 cm. Using π = 3.14, find its area.

    78.5 cm²

    Area A = πr² = 3.14 × 5² = 78.5 cm².

  3. 3. A circle has radius 8 cm. Using π = 3.14, find its area.

    200.96 cm²

    Area A = πr² = 3.14 × 8² = 200.96 cm².

  4. 4. A circle has radius 16 cm. Using π = 3.14, find its area.

    803.84 cm²

    Area A = πr² = 3.14 × 16² = 803.84 cm².

  5. 5. A circle has radius 13 cm. Using π = 3.14, find its area.

    530.66 cm²

    Area A = πr² = 3.14 × 13² = 530.66 cm².

  6. 6. A circle has radius 2 cm. Using π = 3.14, find its circumference.

    12.56 cm

    Circumference C = 2πr = 2 × 3.14 × 2 = 12.56 cm.

  7. 7. A circle has radius 17 cm. Using π = 3.14, find its area.

    907.46 cm²

    Area A = πr² = 3.14 × 17² = 907.46 cm².

  8. 8. A circle has radius 10 cm. Using π = 3.14, find its circumference.

    62.8 cm

    Circumference C = 2πr = 2 × 3.14 × 10 = 62.8 cm.

  9. 9. A circle has radius 19 cm. Using π = 3.14, find its area.

    1133.54 cm²

    Area A = πr² = 3.14 × 19² = 1133.54 cm².

  10. 10. A circle has radius 5 cm. Using π = 3.14, find its circumference.

    31.4 cm

    Circumference C = 2πr = 2 × 3.14 × 5 = 31.4 cm.

  11. 11. A circle has radius 3 cm. Using π = 3.14, find its area.

    28.26 cm²

    Area A = πr² = 3.14 × 3² = 28.26 cm².

  12. 12. A circle has radius 14 cm. Using π = 3.14, find its circumference.

    87.92 cm

    Circumference C = 2πr = 2 × 3.14 × 14 = 87.92 cm.

12 questions · Seed 63 · Age guidance, not curriculum certification