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चतुर्भुज ABCD में, कोणA+कोणD=90^(@). साब...

चतुर्भुज ABCD में, कोणA+कोणD=90^(@). साबित करें कि AC^(2)+BD^(2)=AD^(2)+BC^(2) | 10 | त्रि...

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