A *theorem* is a basic geometric principle which is supported and established by a proof. Theorems are proven to be true by making connections between accepted definitions, postulates, mathematical operations, and previously proven theorems. ** **

If you have an idea that can be demonstrated to be true or works all the time, then the idea is a theorem!

Theorems are usually divided into a hypothesis (what is given) and a conclusion (what needs to be proven). Once a theorem has been proven, it becomes an accepted tool in the proof of any other theorems.