Sin10 sin 50 sin70 = 1) 8
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➺P =50cm
⇒2πr=50cm
⇒2× 22/7 ×r= 50
∴r= 7.96 cm
Now,
area of quadrant of circle= πr²/4
= 22/7 × (7.96)² / 4
= 22/7 × 63.36 / 4
= 199.13 / 4
= 49.7
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