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Year 6 Circumference and Area of Circles Worksheet — Level 1 — 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 1 — 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 3 cm. Find its area, correct to 1 decimal place.

Answer: 28.3 cm2

  1. A = π × r2 = π × 32 = π × 9
  2. ≈ 28.3 cm2
2.A circle has a radius of 18 cm. What is its diameter?

Answer: 36 cm

The diameter is twice the radius.

3.A circle has a diameter of 34 cm. Find its area, correct to 1 decimal place.

Answer: 907.9 cm2

  1. r = 34 ÷ 2 = 17 cm
  2. A = π × r2 = π × 172 = π × 289
  3. ≈ 907.9 cm2
4.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
5.A circle has a diameter of 6 cm. What is its radius?

Answer: 3 cm

The radius is half the diameter.

6.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
7.A circle has a diameter of 22 cm. Find its area, correct to 1 decimal place.

Answer: 380.1 cm2

  1. r = 22 ÷ 2 = 11 cm
  2. A = π × r2 = π × 112 = π × 121
  3. ≈ 380.1 cm2
8.A circle has a radius of 6 cm. Find its circumference, correct to 1 decimal place.

Answer: 37.7 cm

  1. C = 2 × π × r = 2 × π × 6
  2. ≈ 37.7 cm
9.A circle has a diameter of 10 cm. Find its circumference, correct to 1 decimal place.

Answer: 31.4 cm

  1. C = π × d = π × 10
  2. ≈ 31.4 cm
10.A circle has a diameter of 26 cm. What is its radius?

Answer: 13 cm

The radius is half the diameter.

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