Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: More on Congruent and Similar Triangles

9th - 10th Standards
Demonstrates solutions to problems #17-20 of California Geometry released state test questions. Problems address understanding of similar triangles, parallelograms and properties of the diagonals of parallelograms. [11:11]
Instructional Video
Khan Academy

Khan Academy: Geometry: Similarity Postulates

9th - 10th Standards
Explains the minimum amount of information needed to determine if two triangles are similar. Names and illustrates the similarity postulates: AA, SSS, and SAS. [12:14]