Question

In the given figure, AB || PQ and AC | PR.
Prove that BC || QR.​

Answer 1

Answer:

AB//PQ

therefore, ob/bq = oa/ap [by basic proportionality th] -------- (1)

AC//QR

therefore, oc/cr = oa/ap [by basic proportionality th] ---------- (2)

Equating (1) and (2)

we get ob/bq = oc/cr

therefore by converse of basic proportionality theorem, we can say that

BC//QR

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