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 32 cm. Find its area, correct to 1 decimal place.
Answer: 804.2 cm2
- r = 32 ÷ 2 = 16 cm
- A = π × r2 = π × 162 = π × 256
- ≈ 804.2 cm2
2.A circle has a radius of 13 cm. Find its circumference, correct to 1 decimal place.
Answer: 81.7 cm
- C = 2 × π × r = 2 × π × 13
- ≈ 81.7 cm
3.A circle has a diameter of 18 cm. What is its radius?
Answer: 9 cm
The radius is half the diameter.
4.A circle has a radius of 6 cm. Find its circumference, correct to 1 decimal place.
Answer: 37.7 cm
- C = 2 × π × r = 2 × π × 6
- ≈ 37.7 cm
5.A circle has a radius of 20 cm. Find its circumference, correct to 1 decimal place.
Answer: 125.7 cm
- C = 2 × π × r = 2 × π × 20
- ≈ 125.7 cm
6.A circle has a radius of 8 cm. Find its area, correct to 1 decimal place.
Answer: 201.1 cm2
- A = π × r2 = π × 82 = π × 64
- ≈ 201.1 cm2
7.A circle has a radius of 4 cm. What is its diameter?
Answer: 8 cm
The diameter is twice the radius.
8.A circle has a diameter of 32 cm. What is its radius?
Answer: 16 cm
The radius is half the diameter.
9.A circle has a radius of 12 cm. Find its circumference, correct to 1 decimal place.
Answer: 75.4 cm
- C = 2 × π × r = 2 × π × 12
- ≈ 75.4 cm
10.A circle has a diameter of 38 cm. What is its radius?
Answer: 19 cm
The radius is half the diameter.
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