*Learning Goal: Introduce proof structure in a non-math way and then transition towards proving parallel lines & transversal theorems.*

# Google Slides

- Link to Slides
- Taken from Ben Orlin

# Classwork

- Warm Up
- Allowing 15 minutes for research worked well

- Notes
- hit if-then statements pretty heavy in this unit. Use proving parallel lines examples to help solidify what it takes to prove that lines are parallel. Add TEKS.

# Finished Early?

# Standards:

**Common Core**- HSG.CO.C.9 – Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a transversal crosses parallel lines, alternate interior angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a line segment are exactly those equidistant from the segment’s endpoints.

**TEKS**- G.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