Question

In triangle ABC. DE PARALLEL TO BC SUCH THAT AD=1, 8CM AND DB=3.6CM AND AE=1.5CM FIND EC

Answer 1

By Basic Proportionality Theorem  :-

If a line is drawn parallel to one side of a triangle to intersect the other two sides in distinct points, the other two sides are divided in the same ratio. ..

In Δ ABC, DE ∥ BC

AD/DB=AE/EC

1.8/3.6=1.5/EC

EC=3 cm

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