Reversing a scale factor

Reversing a scale factor

Secondary 3
3 marks
TGM Original Questions

It is given that \(\triangle ABC\sim\triangle PQR\), \(AB=12\text{ cm}\), \(PQ=8\text{ cm}\) and \(QR=10\text{ cm}\).

  1. Find the scale factor from \(PQR\) to \(ABC\).[1]
  2. Find \(BC\).[2]

Solution:

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Answer:(a) \(\dfrac32\) (b) \(15\text{ cm}\)

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