3.04 Proving Lines are Parallel

• Introduction
• Learn
• Try It
• Task

Introduction

When working in construction, there are times when the materials need to be parallel. Think about what tools a construction worker would use to be sure the materials are parallel.

Think about the last lesson and the angle relationships that are formed when lines are parallel. Can you list the angle relationships from memory? Explore the interactive links to decide if the lines are parallel given the angle measurements.

• Corresponding Angles
• Alternate Angles

Lesson Objectives

Following successful completion of this lesson, students will be able to... Determine if lines are parallel given the measure of two angles Enduring Understandings You can use the measure of angles to prove that lines are parallel. The above objectives correspond with the Alabama Course of Study: Geometry standards: Geometry Standards: 1 and 9.