Circumference and Area of a Circle Worksheet - Math Monks - Free Printable

Educational worksheet: Circumference and Area of a Circle Worksheet - Math Monks. Download and print for classroom or home learning activities.

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1. Area = π × 20² = 400π cm² ≈ 1256.64 cm²; Circumference = 2 × π × 20 = 40π cm ≈ 125.66 cm
2. Area = π × 36² = 1296π in² ≈ 4071.50 in²; Circumference = 2 × π × 36 = 72π in ≈ 226.19 in
3. Radius = 33/2 = 16.5 in; Area = π × 16.5² = 272.25π in² ≈ 855.30 in²; Circumference = π × 33 = 33π in ≈ 103.67 in
4. Radius = 8/2 = 4 cm; Area = π × 4² = 16π cm² ≈ 50.27 cm²; Circumference = π × 8 = 8π cm ≈ 25.13 cm
5. Area = π × 22.5² = 506.25π cm² ≈ 1590.43 cm²; Circumference = 2 × π × 22.5 = 45π cm ≈ 141.37 cm
6. Circumference = 2πr = 45 → r = 45/(2π); Area = π × (45/(2π))² = 2025/(4π) cm² ≈ 161.12 cm²

Parent Tip: Review the logic above to help your child master the concept of circumference of circles worksheet.

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