## Vertical Angles Theorem - Section 3: Properties from Algebra and the Vertical Angles Proof

Vertical Angles Theorem

# An Introduction to Proof and Parallel Lines

Unit 3: Parallel Lines
Lesson 1 of 5

## Big Idea: Students are introduced to the two-column proof, and put this knowledge to work on vertical angles and the angle pairs created by parallel lines and transversals.

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5 teachers like this lesson
Standards:
Subject(s):
Math, Geometry, parallel lines, transversals, corresponding angles, Similarity and Congruence, substitution, vertical angles, proof, reflexive property, alternate interior angles, same, skew lines
90 minutes

### Beth Menzie

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