2. In a APOR, if p ''9 222 POR, if ...
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2. In a APOR, if p ''9 222 POR, if PQ = QR and L, M and N are the mid-points of the sides PQ, respectively. Prove that LN = MN. ve that the medians of an equilateral triangle are canal ides PQ, QR and I Top.ch oint

JEE/Engineering Exams
Maths
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in ( triangle P Q R ) ( operatorname{LOPR}=operatorname{LORP}(text {LOPposite } 60 ) equal side are ( left.L P=m R=frac{1}{2} Q P(text { given }) quad text { equal }right) ) ( P N=N R text { Emidpoint }) ) ( therefore quad triangle angle P N cong triangle N M R quad ) by ( left(S A S^{prime} text { Propeiny }right) ) ( therefore L N=M N ) (by congruency) tence Proved
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