D and E are any two points on the side AB and AC respectively of the triangle ABC.DG is drawn parallel to BE meets AC in G and EF drawn parallel to CD meets AB in F.Prove that FG is parallel to BC.
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To show that this is correct, note that triangles V AC and V BC are congruent by SSS. ... Let the lines AB and CD intersect at E. Then angles AEB and CED are both straight ... and E are arbitrary points along the two arms of the given angle. ... of FE at D. Through D draw DL parallel to FH and extend GB and HA so they meet.
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