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.
Success TutoringWorksheetsAnswer sheetYear 6 · Mathematics · Area & PerimeterYear 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. What is its diameter?
Answer: 36 cm
The diameter is twice the radius.
2.A circle has a radius of 5 cm. Find its area, correct to 1 decimal place.
Answer: 78.5 cm2
- A = π × r2 = π × 52 = π × 25
- ≈ 78.5 cm2
3.A circle has a radius of 17 cm. Find its area, correct to 1 decimal place.
Answer: 907.9 cm2
- A = π × r2 = π × 172 = π × 289
- ≈ 907.9 cm2
4.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
5.A circle has a diameter of 24 cm. Find its circumference, correct to 1 decimal place.
Answer: 75.4 cm
- C = π × d = π × 24
- ≈ 75.4 cm
6.A circle has a radius of 19 cm. Find its area, correct to 1 decimal place.
Answer: 1134.1 cm2
- A = π × r2 = π × 192 = π × 361
- ≈ 1134.1 cm2
7.A circle has a radius of 15 cm. What is its diameter?
Answer: 30 cm
The diameter is twice the radius.
8.A circle has a radius of 12 cm. Find its area, correct to 1 decimal place.
Answer: 452.4 cm2
- A = π × r2 = π × 122 = π × 144
- ≈ 452.4 cm2
9.A circle has a radius of 6 cm. What is its diameter?
Answer: 12 cm
The diameter is twice the radius.
10.A circle has a diameter of 14 cm. What is its radius?
Answer: 7 cm
The radius is half the diameter.
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