Geometric Rules Quick Reference - MathBitsNotebook (Jr)

Geometric Rules Quick Reference [Junior Level] MathBitsNotebook.com Topical Outline | JrMath Outline | MathBits' Teacher ResourcesTerms of Use Contact Person: Donna Roberts This is a partial listing of the more popular rules (theorems, postulates, and properties) that you will be using in your study of Geometry. First a few words that refer to types of geometric "rules": • A theorem is a statement (rule) that has been proven true using facts, operations and other rules that are known to be true. These are usually the "big" rules of geometry. A short theorem referring to a "lesser" rule is called a lemma. • A corollary is a follow-up to an existing proven theorem. Corollaries are off-shoots of a theorem that require little or no further proof. • A postulate (or axiom) is a statement (rule) that is taken to be true without proof. Euclid derived many of the rules for geometry starting with a series of definitions and only five postulates. • A property is a quality or characteristic belong...