In a parallelogram ABCD, E and F are the
mid-points of sides AB and CD respectively
Show that the line segments AF
and EC trisect the diagonal BD
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Answer:
ABCD is ∥gm
AB∥CD
AE∥FC
⇒AB=CD
21AB=21CD
AE=EC
AECF is ∥gm
In △DQC
F is mid point of DC
FP∥CQ
By converse of mid point theorem P is mid point of DQ
⇒DP=PQ (1)
∴AF and EC bisect BD
In △APB
E is mid point of AB
EQ∥AP
By converse of MPT ( mid point theorem )
Q is mid point of PB
⇒PQ=QB (2)
By (1) and (2)
⇒PQ=QB=DP
AF and EC bisect BD..
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