Geometry Unit 8 Cheat Sheet by CCRoses

geometric mean

the positive square root of the product of two numbers

angle of elevation

the angle formed by a horizontal line and a line of sight to a point above the line

theorem 8-1-1

the altitude to the hypotenuse of a right triangle forms two triangles that are similar to each other and to the original triangle

the law of cosines

for any triangle ABC with side lengths a, b, and c, a² = b² + c² -2bc cosA, b² = a² + c² -2ac cosB, and c² = a² + b² -2ab cosC