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6th Grade Circumference and Area of Circles Worksheet — Level 1 — Practice Set 4 — Answers

Answer sheet with worked solutions for the 6th Grade area & perimeter worksheet.

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Success TutoringWorksheetsAnswer sheet6th Grade · Mathematics · Area & Perimeter

6th Grade Circumference and Area of Circles Worksheet — Level 1 — Practice Set 4 — Answers

Show your work. Use the π button on your calculator and round to 1 decimal place unless told otherwise.

1.A circle has a radius of 16 cm. Find its area, correct to 1 decimal place.

Answer: 804.2 cm2

  1. A = π × r2 = π × 162 = π × 256
  2. ≈ 804.2 cm2
2.A circle has a radius of 4 cm. Find its circumference, correct to 1 decimal place.

Answer: 25.1 cm

  1. C = 2 × π × r = 2 × π × 4
  2. ≈ 25.1 cm
3.A circle has a diameter of 14 cm. Find its area, correct to 1 decimal place.

Answer: 153.9 cm2

  1. r = 14 ÷ 2 = 7 cm
  2. A = π × r2 = π × 72 = π × 49
  3. ≈ 153.9 cm2
4.A circle has a diameter of 36 cm. Find its area, correct to 1 decimal place.

Answer: 1017.9 cm2

  1. r = 36 ÷ 2 = 18 cm
  2. A = π × r2 = π × 182 = π × 324
  3. ≈ 1017.9 cm2
5.A circle has a diameter of 28 cm. Find its area, correct to 1 decimal place.

Answer: 615.8 cm2

  1. r = 28 ÷ 2 = 14 cm
  2. A = π × r2 = π × 142 = π × 196
  3. ≈ 615.8 cm2
6.A circle has a diameter of 4 cm. What is its radius?

Answer: 2 cm

The radius is half the diameter.

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

Answer: 10 cm

The diameter is twice the radius.

8.A circle has a diameter of 26 cm. What is its radius?

Answer: 13 cm

The radius is half the diameter.

9.A circle has a diameter of 32 cm. Find its area, correct to 1 decimal place.

Answer: 804.2 cm2

  1. r = 32 ÷ 2 = 16 cm
  2. A = π × r2 = π × 162 = π × 256
  3. ≈ 804.2 cm2
10.A circle has a radius of 15 cm. What is its diameter?

Answer: 30 cm

The diameter is twice the radius.

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