Question

Asia uses an overhead projector to enlarge a drawing. The original drawing measures 75 cm wide by 100 cm high. She moves the projector so that the width of the projected image is 375 cm. If the original drawing and the projected image are similar figures, what will be the height of the projected image?

Answer 1

You can find the scale factor by dividing the final dimension by the initial dimension

$\frac{375}{75}$, which can be simplified to $\frac{5}{1}$ or 5.

You then multiply the other dimension, the width, by the scale factor to find the width of the enlarged projection.

100 x 5 = 500 cm