Geometry · Similarity & Right Triangles
Scale Factor
HSG-SRT.A.2
Definition
The ratio of corresponding lengths in similar figures, used to enlarge or reduce.
Examples
- If a figure's sides double, the scale factor is 2.
- A scale factor of 1/2 shrinks a figure to half its original size.
Key rule
A scale factor greater than 1 enlarges; less than 1 reduces.
Memory hook
The multiplier that resizes similar figures.