1.

Find the length arc whose radius is 42 cm and central angle is 60°.

Answer»

Length of the arc = θ°/360° × 2πr units

Given central angle 0 = 60°

Radius of the sector r = 42 cm

l = 60°/360° × 2 × 227 × 42 = 44 cm

∴ Length of the arc = 44 cm



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