Question
$\triangle ABC$ is enlarged, with a scale factor $5.$ Find $:\text{ A'B'},$ if $\text{AB} = 4\ cm$
✓
Answer
$\frac{\text { lmage length }}{\text { Actual length }}=\text { Scale factor }$
$\frac{A^{\prime} B^{\prime}}{A B}=5$
$\Rightarrow A^{\prime} B^{\prime}=4 \times 5$
$\Rightarrow A^{\prime} B^{\prime}=20 \ cm .$
$\frac{A^{\prime} B^{\prime}}{A B}=5$
$\Rightarrow A^{\prime} B^{\prime}=4 \times 5$
$\Rightarrow A^{\prime} B^{\prime}=20 \ cm .$
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