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Year 6 Circumference and Area of Circles Worksheet — Level 2 — Answers

Answer sheet with worked solutions for the Year 6 area & perimeter worksheet.

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Success TutoringWorksheetsAnswer sheetYear 6 · Mathematics · Area & Perimeter

Year 6 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 radius of 11 cm. Find its circumference, correct to 1 decimal place.

Answer: 69.1 cm

  1. C = 2 × π × r = 2 × π × 11
  2. ≈ 69.1 cm
2.A circle has a radius of 17 cm. Find its circumference, correct to 1 decimal place.

Answer: 106.8 cm

  1. C = 2 × π × r = 2 × π × 17
  2. ≈ 106.8 cm
3.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
4.Find the area of a semicircle with a radius of 5 cm, correct to 1 decimal place.

Answer: 39.3 cm2

  1. A = ½ × π × r2 = ½ × π × 25
  2. ≈ 39.3 cm2
5.Find the area of a semicircle with a radius of 3 cm, correct to 1 decimal place.

Answer: 14.1 cm2

  1. A = ½ × π × r2 = ½ × π × 9
  2. ≈ 14.1 cm2
6.A circle has a diameter of 24 cm. Find its area, correct to 1 decimal place.

Answer: 452.4 cm2

  1. r = 24 ÷ 2 = 12 cm
  2. A = π × r2 = π × 122 = π × 144
  3. ≈ 452.4 cm2
7.Find the area of a semicircle with a radius of 8 cm, correct to 1 decimal place.

Answer: 100.5 cm2

  1. A = ½ × π × r2 = ½ × π × 64
  2. ≈ 100.5 cm2
8.Find the area of a semicircle with a radius of 9 cm, correct to 1 decimal place.

Answer: 127.2 cm2

  1. A = ½ × π × r2 = ½ × π × 81
  2. ≈ 127.2 cm2
9.A circle has a diameter of 8 cm. Find its area, correct to 1 decimal place.

Answer: 50.3 cm2

  1. r = 8 ÷ 2 = 4 cm
  2. A = π × r2 = π × 42 = π × 16
  3. ≈ 50.3 cm2
10.Find the area of a semicircle with a radius of 15 cm, correct to 1 decimal place.

Answer: 353.4 cm2

  1. A = ½ × π × r2 = ½ × π × 225
  2. ≈ 353.4 cm2
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