Circles

The parts of a circle, its circumference and its area.

3 sheets · 18 questions · one answer key · 4 pages

Recommended for grades 6–8

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Circle parts Sheet 1 of 3

Circle partsRadius to 12

Name: Date:

Use π = 3.14. Each shape is part of a circle — find what the label asks for.

1Area of the slice cm²

2Length of the curved edge cm

3Length of the curved edge cm

4Length of the curved edge cm

5Area of the slice cm²

6Area of the slice cm²

CircumferenceRadius or diameter

Name: Date:

Find the circumference of each circle. Use π = 3.14.

1 cm

2 cm

3 cm

4 cm

5 cm

6 cm

Circle areaRadius or diameter

Name: Date:

Find the area of each circle. Use π = 3.14.

1 cm²

2 cm²

3 cm²

4 cm²

5 cm²

6 cm²

Power Pack · CirclesAnswer key

Circle parts

1. r = 6, 180°, area: 56.52 cm²2. r = 11, 270°, arc: 51.81 cm3. r = 7, 270°, arc: 32.97 cm4. r = 6, 120°, arc: 12.56 cm5. r = 11, 180°, area: 189.97 cm²6. r = 12, 180°, area: 226.08 cm²

Circumference

1. d = 13: 40.82 cm2. r = 16: 100.48 cm3. r = 9: 56.52 cm4. d = 14: 43.96 cm5. d = 7: 21.98 cm6. r = 17: 106.76 cm

Circle area

1. r = 9: 254.34 cm²2. r = 12: 452.16 cm²3. r = 15: 706.5 cm²4. d = 18: 254.34 cm²5. d = 12: 113.04 cm²6. d = 20: 314 cm²

Circles

What is in the pack

The geometry track

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