Chapter 3

Parallel and Perpendicular Lines


Where's the math?

Check out the gymnast on the parallel bars!

Why do you think they are called parallel bars?

You'll learn about properties of parallel lines in this chapter.



Expressing Geometric Properties with Equations

Modeling with Geometry

Big Ideas

Reasoning and Proof

Essential Question: How do you prove that two lines are parallel?


Essential Question: What is the sum of the measures of angles of a triangle?

Coordinate Geometry

Essential Question: How do you write an equation of a line in the coordinate plane?

Remind Stream

Wall of Wisdom