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.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
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.