Correct Answer: Option C
ত্রিভুজের ক্ষেত্রফল =
s = 1/2 (3+4.5+5.5) = 6.5
ত্রিভুজের ক্ষেত্রফল = sqrt{6.5(6.5-3)(6.5-4.5)(6.5-5.5)}
=sqrt {6.5X3.5X2X1}
=sqrt(6.5X7)
Closest answer is 6.75
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