In this lesson, you will finally get to construct a couple of two-column geometric proofs. That's cause for celebration. Please bring cupcakes.

Proof of the Vertical Angles Congruence Theorem

Duration: 15:13

Geometry 4(A) distinguish between undefined terms, definitions, postulates, conjectures, and theorems

Geometry 6(A) verify theorems about angles formed by the intersection of lines and line segments, including vertical angles, and angles formed by parallel lines cut by a transversal and prove equidistance between the endpoints of a segment and points on its perpendicular bisector and apply these relationships to solve problems