Find length of the arc whose central angle = 45, radius =16cm.
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Length of the arc l = θ°/360° × 2πr units l = 45°/360° × 2 × 3.14 × 16 cm l = 1/8 × 2 × 3.14 × 16 cm l = 12.56 cm Area of the sector = θ°/360° × πr2 A = 45°/360° × 3.14 × 16 × 16 A = 100.48 cm2 Perimeter of the sector P = l + 2r units P = 12.56 + 2(16) cm P = 44.56 cm
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