area of a sector of a circle with radius 21 cm and angle 30 degrees is
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Answer:
115.5 cm^2
Step-by-step explanation:
Area of sector = pie r^2 theta / 360°
= 22/7 × 21 × 21 × 30 / 360
= 22 × 3 × 21 / 12
= 22 × 21 / 4
= 464 / 4
= 115.5 cm^2
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