Sides AB and BC and median AD of atriangle ABC are respectively proportionalto sides PQ and QR and medianPM of
Δ PQR (see Fig. 6.41). Show that
Δ ABC ~ Δ PQR.

Median divides the opposite side
BD =
and,
QM = ![]()
Given:
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= ![]()
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In ΔABD and ΔPQM,
![]()
ΔABD
ΔPQM (By SSS similarity)
∠ABD = ∠PQM (Corresponding angles of similar triangles)
In ΔABC and ΔPQR,
∠ABD = ∠PQM (Proved above)
![]()
ΔABC
ΔPQR (By SAS similarity)