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This geometry video tutorial provides a basic introduction into triangle congruence theorems. It explains how to prove if two triangles are congruent using the SSS, SAS, ASA, and AAS postulate using two column proofs. Here is a list of topics contained in the statements and reasons of the two column proofs: Definition of midpoints, reflexive property, congruent angles, perpendicular lines, right angles, vertical angles, supplements of congruent angles, angle bisectors, triangles in circles, overlapping triangles, addition property of equality, segment addition, definition of congruent segments, and segment trisectors. This video contains plenty of examples and practice problems.

2 Column Proofs of Congruent Segments:


2 Column Proofs of Angles:


Triangle Congruence - SSS, SAS, ASA:


CPCTC - 2 Column Proofs With Triangles:


Median of a Triangle Formula:


Altitude of a Triangle - Orthocenter:


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Triangles, Medians, & Altitudes - Proofs:


2 Column Proofs - Isosceles Triangles:


Angle Side Theorem - 2 Column Proofs:


Hypotenuse Leg Theorem - HL Postulate:


Detour Proofs - Double Triangle Congruence:


Missing Diagrams - 2 Column Proofs:


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Final Exams and Video Playlists:


Full-Length Videos and Worksheets:

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