Ch 8: Amsco Geometry Chapter 9: Parallel Lines

About This Chapter

The Parallel Lines chapter of this Amsco Geometry Textbook course helps students learn essential geometry lessons of parallel lines. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Parallel Lines textbook chapter.

How it works:

  • Identify the lessons in the Amsco Geometry Parallel Lines chapter with which you need help.
  • Find the corresponding video lessons within this companion course chapter.
  • Watch fun videos that cover the parallel lines topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn about:

  • Proving that lines are parallel
  • Characteristics of parallel lines
  • The coordinate plane and parallel lines
  • Adding the measures of the angles of a triangle
  • Proving that triangles are congruent
  • The converse of the isosceles triangle
  • Exterior and interior angles of polygons

Amsco is a registered trademark of Amsco, which is not affiliated with Study.com.

6 Lessons in Chapter 8: Amsco Geometry Chapter 9: Parallel Lines
Test your knowledge with a 30-question chapter practice test
Parallel Lines: How to Prove Lines Are Parallel

1. Parallel Lines: How to Prove Lines Are Parallel

Watch this video lesson to learn how you can prove that two lines are parallel just by matching up pairs of angles. Learn which angles to pair up and what to look for.

Using Converse Statements to Prove Lines Are Parallel

2. Using Converse Statements to Prove Lines Are Parallel

Because a pair of parallel lines produces unique angle characteristics, we can use this information to our advantage. Watch this video lesson to see how we turn this advantage into converse statements to help us prove parallel lines.

The Parallel Postulate: Definition & Examples

3. The Parallel Postulate: Definition & Examples

In this lesson, you will learn about an important postulate in Euclidean geometry, called the Parallel Postulate. It sounds kind of hard, but this lesson explains it in simple terms and provides several examples of it as well.

Parallel, Perpendicular and Transverse Lines

4. Parallel, Perpendicular and Transverse Lines

What are the different types of lines? Where are they visible in the real world and how can you recognize them? Find out here and test your knowledge with a quiz.

Angles Formed by a Transversal

5. Angles Formed by a Transversal

When you have a pair of parallel lines and a transversal, something very interesting happens to the angles that are formed. You can see this happen in real life at street intersections and such. Watch this video lesson to learn about all of this.

The HL (Hypotenuse Leg) Theorem: Definition, Proof, & Examples

6. The HL (Hypotenuse Leg) Theorem: Definition, Proof, & Examples

In this lesson, we'll learn about the hypotenuse leg theorem. This theorem enables us to prove two right triangles are congruent based on just two sides.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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