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Math worksheet for calculating arc lengths of circle sectors and semi-circles.

Worksheet with four problems asking to find the arc length of shaded and unshaded sectors of circles, including a semi-circle, with given radii and angles.

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Show Answer Key & Explanations Step-by-step solution for: Circles - Arc Length - Degrees worksheet

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1. Arc length = (60/360) * 2π * 2 = (1/6) * 4π = (2/3)π cm
Rounded Answer = 2.09 cm

2. Arc length = (240/360) * 2π * 7 = (2/3) * 14π = (28/3)π m
Rounded Answer = 29.32 m

3. Arc length = (85/360) * 2π * 6 = (17/72) * 12π = (17/6)π cm
Rounded Answer = 8.90 cm

4. Arc length = (100/360) * 2π * 9 = (5/18) * 18π = 5π cm
Rounded Answer = 15.71 cm

5. Arc length = (180/360) * 2π * 8 = (1/2) * 16π = 8π in
Rounded Answer = 25.13 in

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

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