Mathematics · Geometry
एक त्रिभुज ABC में, AB = 21 सेमी, BC = 20 सेमी और CA = 13 सेमी है। सबसे लंबी भुजा पर एक लंब CD खींचा जाता है। त्रिभुज BCD का क्षेत्रफल क्या है?
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