Correct Answer: Option B
এখানে,
a = 20,
b = 21,
c = 29,
অর্ধ-পরিসীমা s = (a + b + c)/2
= (20 + 21 + 29)/2
= 35
∴ ক্ষেত্রফল = √{35(35 - 20)(35 - 21)(35 - 29)}
= √(35 × 15 × 14 × 6)
= 210 বর্গমি
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