Two-Column Proofs: How to Write Statements and Reasons
A two-column proof is a logical argument arranged in a table: the left column states each fact, and the right column explains why that fact is true. Start from the givens and finish with the statement you were asked to prove. A reason can be a definition, a property, a postulate, or a theorem you […]
Ultimate Guide to Proving Angles Congruent: Techniques and Tips
To prove two angles congruent, show that they have equal measures using a given fact, a congruence property, or an angle theorem. Write each statement with its reason. A diagram that looks equal is not enough evidence by itself. Quick answer: To prove two angles are congruent, show they have equal measures or match them […]
