Question
What is the perimeter (in cm, rounded off to one decimal
place) of the sector of a circle with a radius of 10 cm and of angle 30°? (Use π = 3.14)Solution
Arc length (L) =30°/360° × 2πr =(1/12) × 2 × 3.14 × 10 = 5.233 Perimeter (P) = 2r + L = 20 + 5.233 = 25.2 cm (rounded)
567, 598, 635, ? , 719, 766
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