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Math worksheet for calculating the perimeter of semicircles using the formula P = (π × d) ÷ 2 + d, with examples and an extension section.

Worksheet with six semicircle diagrams and formulas for calculating the perimeter of a semicircle, including examples with given diameters and step-by-step calculations.

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ID: #857806

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Show Answer Key & Explanations Step-by-step solution for: Area and perimeter of semicircles scaffolded worksheet | Teaching ...

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- Circumference of a circle = π × d
- Perimeter of semicircle = (π × d) ÷ 2 + d

1) P = (π × 10) ÷ 2 + 10
= 15.7 + 10
= 25.7m

2) P = (π × 19) ÷ 2 + 19
= 29.8 + 19
= 48.8cm

3) P = (π × 8) ÷ 2 + 8
= 12.6 + 8
= 20.6cm

4) P = (π × 20) ÷ 2 + 20
= 31.4 + 20
= 51.4m

5) P = (π × 7) ÷ 2 + 7
= 11.0 + 7
= 18.0cm

6) P = (π × 3) ÷ 2 + 3
= 4.7 + 3
= 7.7cm

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

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