Loading…
Understand similar figures, scale factors, and proportional reasoning in geometry.
Learn step-by-step with practice exercises built right in.
Two figures are similar () if:
The ratio of corresponding side lengths:
No example problems available yet.
Review key concepts with our flashcard system
Explore more Geometry topics
If two angles of one triangle are congruent to two angles of another, the triangles are similar.
If all three pairs of corresponding sides are proportional:
If two pairs of corresponding sides are proportional AND the included angles are congruent.
If with scale factor :
| Measurement | Scale |
|---|---|
| Lengths | |
| Perimeters | |
| Areas | |
| Volumes |
A transformation that produces similar figures:
Center at origin, scale factor .
If a line parallel to one side of a triangle intersects the other two sides, it creates a smaller similar triangle.
Triangle Proportionality Theorem:
Remember: Similar figures have the SAME shape but can be different SIZES. Congruent figures are similar with scale factor .