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Question

In the adjoining figure, AD=5.6 cm, AB=8.4cm, AE=3.8cm and AC=5.7cm. Show that DE||BC.


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Solution

We have,
AD=5.6cm, DB=(AB-AD)=(8.4-5.6)CM=2.8CM
AE=3.8cm, EC=(AC-AE)=(5.7-3.8)CM=1.9CM
AEEC3.81.921 and ADDB5.62.821
Thus, ADDBAEEC
DE divides AB and AC proportionally.
Hence, DE||BC


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