Section Warm-Up

Before we begin this section, let’s take some time to think about what we already know.  In your notebook, answer the following questions.  Keep these with you as you work through this section.

• What is a right angle?
• What is a straight angle?
• What would the sum of the measures of two angles be if together they make a straight angle?
• What is the angle where perpendicular lines intersect?
• What are parallel lines?