alleryত্ৰিকোণীয় পতাকাৰ ভিত্তি 18 চে.মি. আৰু উচ্চতা 10 চে.মি.; ইয়াৰ এলেকা কিমান?
A45 cm²
B28 cm²
C90 cm²
D180 cm²
Answer & Solution
Correct answer: C. 90 cm²
পতাকাৰ আয়তন ½ × 18 × 10 = 90 cm²
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