Question

what is the scale factor of an enlargement that makes a figure half as large? a) 0.25 b) 0.5 c) 1 d) 2

Explanation:

Step1: Recall scale - factor concept

The scale factor $k$ of a dilation (enlargement or reduction) is the ratio of the corresponding side lengths of the new figure to the original figure. If the new figure is half as large as the original figure, it means the ratio of the side - length of the new figure to the side - length of the original figure is $\frac{1}{2}=0.5$.

Answer:

B. 0.5