8th Grade · Geometry
Similar Figures
8.G.A.4
Definition
Figures with the same shape but not necessarily the same size. Their corresponding angles are equal and corresponding sides are proportional.
Examples
- A triangle scaled by 2: all sides double, all angles stay equal.
- Similar figures use the symbol ~.
Key rule
Similar figures have equal angles and proportional sides.
Memory hook
Same shape, sizes can differ.