alleryஹெரான் சூத்திரத்தின்படி, 13, 14 மற்றும் 15 cm பக்கங்களைக் கொண்ட ஒரு முக்கோணத்தின் பரப்பளவு என்ன?
A42 cm²
B168 cm²
C91 cm²
D84 cm²
Answer & Solution
Correct answer: D. 84 cm²
அரைச் சுற்றளவு 21 ஆகும், எனவே பரப்பளவு 21 x 8 x 7 x 6 என்பதன் வர்க்கமூலம் = 84 சதுர சென்டிமீட்டர் ஆகும்.
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