How Do You Prove Angles Are Congruent?
Proving that angles are congruent is a core skill in geometry. Two angles are congruent when they have the same measure (in degrees).
Unlocking the Secrets of Triangle Angle Sum
TL;DR: The interior angles of any triangle sum to 180 degrees. This rule — the Triangle Angle Sum Theorem — is one of the most useful facts in geometry. Once you know two angles, the third is automatic; once you know one angle, the other two have a clean constraint to work with. Key takeaways: […]
