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Question

L and M are the mid-points of sides AB and DC respectively of parallelogram ABCD. Prove that segments DL and BM trisect diagonal AC. StateTrue or False.

A
True
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B
False
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Solution

The correct option is A True
Given: Parallelogram ABCD, L and M are mid points of AB and DC respectively.
We know,
AB=CD
Hence, DM=LB and DMLB (As, ABCD)
Suppose DL and MB intersect AC at P and Q respectively.
Consider, ABC,
PLQB
L is mid point of AB
Hence, P is mid point of AQ (Converse of mid point theorem)
Thus, AP=PQ (1)
Similarly, in CDP
CQ=QP (2)
From (1) and (2)
AP=PQ=CQ
Hence, P and Q trisect diagonal AC

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