Geometry Ready Reference Author:School Specialty Publishing, School Specialty Publishing Geometry Ready Reference IF659 lists geometry formulas: General; Heron's; Triangles; Special Right Triangles; Circles; Regular Polygons; Areas of Polygons; Trigonometry; Linear Equations; Triangle Angle-Bisector Theorem; Similarities in Right Triangles; Ways to Prove Triangles are Congruent; Ways to Prove Quadrilateral is a Parellelogram; Proper... more »ties of Proportions and Area & Volume.« less