**Bonus section **

**Use the theorems, postulates, and definitions listed below for the exercises. **

**Definitions**

**transversal**
**Postulates:**

**Corresponding Angles**
**Theorems:**

**Alternate Interior Angles Theorem (AIA)**
**Converse of AIA Theorem**
**Alternate Exterior Angles Theorem (AEA)**
**Converse of AEA Theorem**
**Same-side Interior Angles Theorem (SIA)**
**Converse of SIA**
**Coplanar lines perpendicular to the same line are parallel.**
**Coplanar lines parallel to the same line are parallel.**
**Second half of unit:**

**Postulates and Theorems:**

**The Parallel Postulate**
**Triangle Sum Theorem**
**Exterior Angle Theorem**
**Sum of Exterior Angles of a Polygon Theorem.**
**Sum of Interior Angles of a Polygon Theorem**