Similarity

Lessons Videos Interactive Practice Interactive Practice Worksheets
Similar Polygons
Similar Triangles Similar Triangles - Part 1
(Basics of Similar Triangles)

Similar Triangles - Part 2
(One-Unknown Variable)

Similar Triangles - Part 3
(Two-Unknown Variables)

Similar Triangles - Part 4 (One-Side Splitter)
Similar Triangles - Part 5 (Two-Sides Splitter)
Similar Triangles - Part 6 (Bow-Tie)
Proving Triangle Similarity by AA
Proving Triangle Similarity by SSS
Proving Triangle Similarity by SAS
Proportionality Theorems