Year 6 Circumference and Area of Circles Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 6 area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheetYear 6 · Mathematics · Area & PerimeterYear 6 Circumference and Area of Circles Worksheet — Level 1 — Practice Set 3 — 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 4 cm. Find its circumference, correct to 1 decimal place.
Answer: 12.6 cm
- C = π × d = π × 4
- ≈ 12.6 cm
2.A circle has a diameter of 10 cm. Find its area, correct to 1 decimal place.
Answer: 78.5 cm2
- r = 10 ÷ 2 = 5 cm
- A = π × r2 = π × 52 = π × 25
- ≈ 78.5 cm2
3.A circle has a diameter of 30 cm. Find its area, correct to 1 decimal place.
Answer: 706.9 cm2
- r = 30 ÷ 2 = 15 cm
- A = π × r2 = π × 152 = π × 225
- ≈ 706.9 cm2
4.A circle has a radius of 9 cm. Find its area, correct to 1 decimal place.
Answer: 254.5 cm2
- A = π × r2 = π × 92 = π × 81
- ≈ 254.5 cm2
5.A circle has a diameter of 32 cm. Find its circumference, correct to 1 decimal place.
Answer: 100.5 cm
- C = π × d = π × 32
- ≈ 100.5 cm
6.A circle has a diameter of 18 cm. Find its circumference, correct to 1 decimal place.
Answer: 56.5 cm
- C = π × d = π × 18
- ≈ 56.5 cm
7.A circle has a radius of 7 cm. What is its diameter?
Answer: 14 cm
The diameter is twice the radius.
8.A circle has a diameter of 22 cm. What is its radius?
Answer: 11 cm
The radius is half the diameter.
9.A circle has a diameter of 16 cm. Find its area, correct to 1 decimal place.
Answer: 201.1 cm2
- r = 16 ÷ 2 = 8 cm
- A = π × r2 = π × 82 = π × 64
- ≈ 201.1 cm2
10.A circle has a radius of 17 cm. What is its diameter?
Answer: 34 cm
The diameter is twice the radius.
Marking tips
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