A statement about real numbers that is accepted as true without proof.
A form of reasoning by which each conclusion follows from the previous one; an argument is built by conclusions that progress towards a final statement.
A form of reasoning in which a conclusion is reached based on a pattern present in numerous observations.
A statement about geometry that is accepted as true without proof.
A statement in geometry that has been proved.
Terms that aren't defined, but instead explained; they form the foundation for all definitions in geometry.