(a)[2]
Explain why triangle $BDC$ and triangle $ABC$ are similar.
(b)[2]
If $AC = 10$ cm, $BC = 8$ cm and $BD = 6$ cm are given, calculate $AB$.
Mathematics 4024 · O Level · Similarity
Similarity — practice question
The diagram depicts triangle $ABC$. Point $D$ lies on $AC$ so that $\angle BDC = \angle ABC$.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The angle at C is common to both triangles; $\angle BDC = \angle ABC$; therefore the triangles are similar.” …
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