In Fig `DE|| OQ and DF ||OR` . Show that `EF||QR`.

In Fig A, B and C are points on OP, OQ and OR respectively such that AB || PQ and AC || PR . Show that BC || QR.

In the figure DE"||"AC and DF"||"AE . Prove that (BF)/(FE)=(BE)/(EC) . OR In fig LM"||"CB and LM"||"CD , Prove that (AM)/(AB)=(AN)/(AD)

In Delta ABC , DE || BC and CD || EF . Prove that AD^(2) = AF xx AB

In Fig DE||AC and AE . Prove that (BF)/(FE) = (BE)/(EC)

In the adjacent figure DeltaABC, D is the midpoint of BC. DE_|_AB, DF_|_AC and DE = DF . Show that DeltaBED ~= Delta CFD .

In the figure, AC = AE, AB = AD and BAD = EAC. Show that BC = DE

In DeltaABC and DeltaDEF , AB= DE, AB abs DE, BC= EF and BC abs EF . Vertices A, B and C are joined to vertices D, E and F respectively. Show that AD abs CF and AD = CF

In Fig. If Delta ABE = ACD , show that Delta ADE ~ Delta ABC .