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Measure of an arc of a circle is 80° and its radius is 18 cm. Find the length of the arc. (π = 3.14) |
Answer» Given: Radius (r) = 18 cm, Measure of the arc (θ) = 80° To find: Length of the arc. Length of arc = θ/360 × 2πr = 8/360 × 2 × 3.14 × 18 = 2/9 × 2 × 3.14 × 18 = 2 × 2 × 3.14 × 2 = 25.12 cm ∴ The length of the arc is 25.12 cm. |
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