Success TutoringWorksheets

Year 7 Circumference and Area of Circles Worksheet — Level 2 — Answers

Answer sheet with worked solutions for the Year 7 area & perimeter worksheet.

Download answers PDFPrint answersBack to worksheet
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · Area & Perimeter

Year 7 Circumference and Area of Circles Worksheet — Level 2 — Answers

Show your working. Use the π button on your calculator and round to 1 decimal place unless told otherwise.

1.A circle has a diameter of 16 cm. Find its circumference, correct to 1 decimal place.

Answer: 50.3 cm

  1. C = π × d = π × 16
  2. ≈ 50.3 cm
2.A circle has a radius of 3 cm. Find its circumference, correct to 1 decimal place.

Answer: 18.8 cm

  1. C = 2 × π × r = 2 × π × 3
  2. ≈ 18.8 cm
3.A circle has a diameter of 38 cm. Find its circumference, correct to 1 decimal place.

Answer: 119.4 cm

  1. C = π × d = π × 38
  2. ≈ 119.4 cm
4.A circle has a radius of 8 cm. Find its area, correct to 1 decimal place.

Answer: 201.1 cm2

  1. A = π × r2 = π × 82 = π × 64
  2. ≈ 201.1 cm2
5.Find the area of a semicircle with a radius of 6 cm, correct to 1 decimal place.

Answer: 56.5 cm2

  1. A = ½ × π × r2 = ½ × π × 36
  2. ≈ 56.5 cm2
6.A circle has a diameter of 22 cm. Find its circumference, correct to 1 decimal place.

Answer: 69.1 cm

  1. C = π × d = π × 22
  2. ≈ 69.1 cm
7.Find the area of a semicircle with a radius of 12 cm, correct to 1 decimal place.

Answer: 226.2 cm2

  1. A = ½ × π × r2 = ½ × π × 144
  2. ≈ 226.2 cm2
8.A circle has a diameter of 18 cm. Find its area, correct to 1 decimal place.

Answer: 254.5 cm2

  1. r = 18 ÷ 2 = 9 cm
  2. A = π × r2 = π × 92 = π × 81
  3. ≈ 254.5 cm2
9.A circle has a diameter of 36 cm. Find its area, correct to 1 decimal place.

Answer: 1017.9 cm2

  1. r = 36 ÷ 2 = 18 cm
  2. A = π × r2 = π × 182 = π × 324
  3. ≈ 1017.9 cm2
10.A circle has a radius of 15 cm. Find its circumference, correct to 1 decimal place.

Answer: 94.2 cm

  1. C = 2 × π × r = 2 × π × 15
  2. ≈ 94.2 cm
Free worksheets at worksheets.successtutoring.com · © Success Tutoring · Free for personal and classroom use

Marking tips

  • Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
  • For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
  • Celebrate what went well first, then pick one thing to work on next.

Great work. Here's what to try next: