allery21 cm ஆரம் கொண்ட வட்டப் பிரிவு 86 cm சுற்றளவைக் கொண்டுள்ளது. அதன் பகுதியைக் கண்டறியவும்; π = 22/7 ஐப் பயன்படுத்தவும்.
A462 cm²
B231 cm²
C693 cm²
D924 cm²
Answer & Solution
Correct answer: A. 462 cm²
வில் 86−2×21 = 44 செ.மீ., கோணம் 44/132×360° =120°;
பரப்பளவு 120/360×(22/7)×21² =462 cm²
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