Topics covered in this video:isosceles triangles, angle-angle-side theorem, hypotenuse-leg theorem, polygons, concave and convex regions, regular polygons, rectangles, parallelograms, squares, rhombi, and trapezoids.

Originally released by Cerebellum Corporation, 2011. Streaming video file encoded with permission for digital streaming by Infobase on July 10, 2018.

Review Basics: Special Triangles (2:02); --Isosceles & Right Triangle Theorems (6:53); -- General Definitions (3:42); -- Quadrilaterals & Their Secret Information (4:35); -- Similarities Between Triangles (3:12); -- Proving the Similarity Of Triangles (2:51); -- Credits: Special Triangles (1:07); .