Geometry, Two Column Proofs of Angles – Addition, Substitution & Transitive Property

This geometry video tutorial provides a basic introduction into two column proofs with angles. It covers the addition and subtraction property of equality as well as the substitution and transitive property of congruence. It also covers vertical angles, angle supplements and more. This video contains plenty of examples and practice problems on angle proofs.

Geometry Introduction:

Addition & Subtraction Equality Property:

Multiplication & Division Property Equality:

Transitive Property of Congruence:

Triangles – Basic Introduction:

Alternate Interior & Exterior Angles:

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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:

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