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Question

In figure 5.54 seg PD is the median of PQR. Point G is the mid-point of seg PD
Show that PMPR=13

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Solution

Given:
D is the mid point of QR.
G is the midpoint of PD.

Let us assume that DN QMConsider PDNG is the midpoint of PD (Given)And,GMDNTherefore, M is the midpoint of PN (By converse of midpoint theorem)Now, consider RQMD is the midpoint of QR (PD is the median)And,DNQMTherefore, N is the midpoint of MR (By converse of midpoint theorem)Thus, M and N divides PR into three equal parts.3PM = PRor, PMPR=13

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