एक $\triangle A B C$ में $A D, B C$ पर लंब है। सिद्ध करें कि $\left(A B^{2}+C D^{2}\right)=\left(A C^{2}+B D^{2}\right)$
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एक $\triangle A B C$ में $A D, B C$ पर लंब है। सिद्ध करें कि $\left(A B^{2}+C D^{2}\right)=\left(A C^{2}+B D^{2}\right)$.

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Solution : समकोण $\triangle A D B$ में, $A B^{2}=B D^{2}+A D^{2}$. समकोण $\triangle A D C$ में, $C D^{2}=A C^{2}-A D^{2}$.

$\therefore$ जोड़ने पर, $A B^{2}+C D^{2}=B D^{2}+A C^{2}$.

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