alleryꯑꯣꯏꯒꯅꯤ꯫ ꯔꯦꯗꯤꯌꯁ 21 cmꯒꯤ ꯁꯔꯀꯨꯂꯥꯔ ꯁꯦꯛꯇꯔ ꯑꯃꯒꯤ ꯄꯦꯔꯤꯃꯤꯇꯔ 86 cm ꯂꯩ꯫ ꯃꯁꯤꯒꯤ ꯃꯐꯝ ꯑꯁꯤ ꯊꯤꯕꯥ; π = 22/7 ꯁꯤꯖꯤꯟꯅꯧ꯫
A462 cm²
B231 cm²
C693 cm²
D924 cm²
Answer & Solution
Correct answer: A. 462 cm²
ꯑꯣꯏꯒꯅꯤ꯫
ꯑꯥꯔꯛ ꯑꯁꯤ 86−2×21 = 44 ꯁꯦ.ꯃꯤ.ꯅꯤ, ꯃꯁꯤꯅꯥ ꯑꯦꯉ꯭ꯒꯜ 44/132×360° =120° ꯄꯤ;
ꯑꯦꯔꯤꯌꯥ ꯑꯁꯤ 120/360×(22/7)×21² =462 cm² ꯑꯣꯏ꯫
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