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Year 6 Circumference and Area of Circles Worksheet — Level 2 — Practice Set 4 — 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 — Practice Set 4 — 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 2 cm. Find its circumference, correct to 1 decimal place.

Answer: 12.6 cm

  1. C = 2 × π × r = 2 × π × 2
  2. ≈ 12.6 cm
2.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
3.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
4.A circle has a radius of 5 cm. Find its circumference, correct to 1 decimal place.

Answer: 31.4 cm

  1. C = 2 × π × r = 2 × π × 5
  2. ≈ 31.4 cm
5.A circle has a diameter of 4 cm. Find its area, correct to 1 decimal place.

Answer: 12.6 cm2

  1. r = 4 ÷ 2 = 2 cm
  2. A = π × r2 = π × 22 = π × 4
  3. ≈ 12.6 cm2
6.A circle has a radius of 15 cm. Find its area, correct to 1 decimal place.

Answer: 706.9 cm2

  1. A = π × r2 = π × 152 = π × 225
  2. ≈ 706.9 cm2
7.Find the area of a semicircle with a radius of 11 cm, correct to 1 decimal place.

Answer: 190.1 cm2

  1. A = ½ × π × r2 = ½ × π × 121
  2. ≈ 190.1 cm2
8.Find the area of a semicircle with a radius of 20 cm, correct to 1 decimal place.

Answer: 628.3 cm2

  1. A = ½ × π × r2 = ½ × π × 400
  2. ≈ 628.3 cm2
9.A circle has a radius of 12 cm. Find its circumference, correct to 1 decimal place.

Answer: 75.4 cm

  1. C = 2 × π × r = 2 × π × 12
  2. ≈ 75.4 cm
10.A circle has a radius of 4 cm. Find its area, correct to 1 decimal place.

Answer: 50.3 cm2

  1. A = π × r2 = π × 42 = π × 16
  2. ≈ 50.3 cm2
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