Correct Answer: Option B
ত্রিভুজের তিন বাহু = 20 m, 21 m, 29 m
অর্ধপরিসীমা,
s = (20 + 21 + 29) / 2 = 35
ক্ষেত্রফল = √{ s(s-a)(s-b)(s-c) }
= √{ 35 × (35-20) × (35-21) × (35-29) }
= √{ 35 × 15 × 14 × 6 }
= √44100
= 210 m²
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