When making a guess and retesting this information, a theory or may be formed which explains why something has occurred or what it may look like?

Model

When making a guess and retesting this information, a theory or model may be formed which explains why something has occurred or what it may look like. Models are a representation of a certain situations that has occurred. These models can provide and amplify a clearer perception and comprehension of how and what processes are involved in an occurred phenomenon. And by that said, it can change and be modified depending on which factor catalyzed the alterations.  

One unique triangle, because those angles add up to 180, and that's how many degrees there are in one triangle.