Question

$△ABC$ is enlarged, about the point $O$ as the centre of enlargement, and the scale factor is $3$. State the value of $\frac{C^{\prime }{A}^{\prime }}{CA}$

Answer 1

Every side of $△ABC$ will be enlarged by 3 to give sides of $△A^{\prime }{B}^{\prime }{C}^{\prime }$

$\therefore 3\times CA=C^{\prime }{A}^{\prime }$

$⟹\frac{C^{\prime }{A}^{\prime }}{CA}=3$