CBSE Class 10 Answered
D is a point
Asked by sonali221994 | 05 Feb, 2010, 01:48: PM
Expert Answer
In quadrilateral, NDMB,
BND = 90, NBM = 90, BMD = 90, and hence MDN = 90,
It could be a square or rectangle,
Hence DN = BM, DM = NB,
BDC, using Pythagorus's theorem,
DB2 + DC2 = BC2
DB2 + DC2 = (BM+MC)2
DB2 + DC2 = (DN+MC)2
DB2 + DC2 = DN2 + MC2 +2DN MC
DB2 - DN2 + DC2 - MC2 = 2DN MC
DM2 + DM2 = 2DN MC
DM2 = DN.MC
Regards,
Team,
TopperLearning.
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