This video outlines basic triangles you should know for the SAT. The triangles are classified by side and by side. In this video you will learn: 1) 3-4-5 triangles and similar triangles 2) 5-12-13 triangles and similar triangles 3) 45-45-90 right triangle and similar triangles 4) 30-60-90 triangle and similar triangles 5) equilateral triangles 6) relationship between equilateral and 30-60-90 triangles