4: Congruent Triangles Last updated Save as PDF Page ID 23604 Anton Petrunin Pennsylvannia State University 4.1: Side-Angle-Side Condition 4.2: Angle-Side-Angle Condition 4.3: Isoseles Triangles A triangle with two equal sides is called isosceles; the remaining side is called the base. 4.4: Side-Side-Side condition 4.5: On side-side-angle and side-angle-angle