# Proving Theorems

- Author:
- Aaron Dankman, Tim Brzezinski

## Respond to prompts 1.8-1.10 in you daily notebook.

These are designed to help you prepare for this week's quiz. Think about what information you have to include in order to

*logically justify*every element of your proof. Make sure to include diagrams and refer to them in each proof.## 1.8 What theorem is illustrated in the diagram below? Prove the theorem.

## 1.9 Prove the corresponding angles theorem using transformations.

## 1.10 Two-Column Proof

A. Use the two theorems above to construct a

__two-column__proof that alternate interior angles are congruent. B. Use the two theorems above to construct a__two-column__proof that alternate exterior angles are congruent. Hint: look up the Transitive Property in your special notebook.