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Year 6 Circumference and Area of Circles Worksheet — Level 1 — Practice Set 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 1 — Practice Set 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 18 cm. Find its area, correct to 1 decimal place.

Answer: 1017.9 cm2

  1. A = π × r2 = π × 182 = π × 324
  2. ≈ 1017.9 cm2
2.A circle has a diameter of 20 cm. Find its circumference, correct to 1 decimal place.

Answer: 62.8 cm

  1. C = π × d = π × 20
  2. ≈ 62.8 cm
3.A circle has a diameter of 16 cm. What is its radius?

Answer: 8 cm

The radius is half the diameter.

4.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
5.A circle has a diameter of 18 cm. What is its radius?

Answer: 9 cm

The radius is half the diameter.

6.A circle has a diameter of 12 cm. Find its circumference, correct to 1 decimal place.

Answer: 37.7 cm

  1. C = π × d = π × 12
  2. ≈ 37.7 cm
7.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
8.A circle has a radius of 18 cm. Find its circumference, correct to 1 decimal place.

Answer: 113.1 cm

  1. C = 2 × π × r = 2 × π × 18
  2. ≈ 113.1 cm
9.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
10.A circle has a diameter of 22 cm. What is its radius?

Answer: 11 cm

The radius is half the diameter.

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