alleryHeron-এর সূত্র অনুযায়ী, 13, 14 এবং 15 cm বাহুবিশিষ্ট একটি ত্রিভুজের ক্ষেত্রফল কত?
A42 cm²
B168 cm²
C91 cm²
D84 cm²
Answer & Solution
Correct answer: D. 84 cm²
অর্ধ-পরিসীমা হলো 21, তাই ক্ষেত্রফল হলো 21 x 8 x 7 x 6-এর বর্গমূল = 84 square centimetres।
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