This is a two page document summarizing twelve geometry theorems. The geometry theorems are: Isosceles Triangle Theorem, Angle Sum Triangle Theorem, Equilateral Triangle Theorem, Opposite Angle Theorem, Supplementary Angle Theorem, Complementary Angle Theorem, 3 Parallel Line Theorems, Exterior Angle Theorem, Exterior Angles of a Polygon and Interior Angles of a Polygon. All of my math summary sheets (15) can be found in one PDF file.