Ch 3: Similar & Congruent Triangle Proofs in Geometry

About This Chapter

The Similar & Congruent Triangle Proofs in Geometry chapter of this Geometry Proofs: Help & Tutorials course is the simplest way to master similar & congruent triangle proofs. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure you learn the essentials of similar & congruent triangle proofs.

Who's It For?

Anyone who needs help learning or mastering similar & congruent triangle proofs will benefit from the lessons in this chapter. There is no faster or easier way to learn similar & congruent triangle proofs in geometry. Among those who would benefit are:

  • Students who have fallen behind in understanding similar & congruent triangle proofs
  • Students who struggle with learning disabilities or learning differences, including autism and ADHD
  • Students who prefer multiple ways of learning math (visual or auditory)
  • Students who have missed class time and need to catch up
  • Students who need an efficient way to learn about similar & congruent triangle proofs
  • Students who struggle to understand their teachers
  • Students who attend schools without extra math learning resources

How It Works:

  • Find videos in our course that cover what you need to learn or review.
  • Press play and watch the video lesson.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Verify you're ready by completing the similar & congruent triangle proofs in geometry chapter exam.

Why It Works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the complex numbers chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any similar & congruent triangle proofs question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students Will Review:

This chapter helps students review the concepts in a similar & congruent triangle proofs unit of a standard geometry proofs course. Topics covered include:

  • The Triangle Proportionality Theorem
  • Similar triangles
  • Congruence proofs
  • The Angle-Angle-Side Theorem
  • The congruence of isosceles triangles

10 Lessons in Chapter 3: Similar & Congruent Triangle Proofs in Geometry
Test your knowledge with a 30-question chapter practice test
Triangle Proportionality Theorem

1. Triangle Proportionality Theorem

Watch this video lesson to learn all about the triangle proportionality theorem and how you can use this interesting theorem to help you solve problems. Learn how a parallel line can create sides that are proportional to each other.

The Transitive Property of Similar Triangles

2. The Transitive Property of Similar Triangles

Watch this video lesson and you will understand what the transitive property is and how it applies to similar triangles. Watch as we apply the transitive property to three similar triangles.

How to Identify Similar Triangles

3. How to Identify Similar Triangles

Similar triangles have the same characteristics as similar figures but can be identified much more easily. Learn the shortcuts for identifying similar triangles here and test your ability with a quiz.

Applications of Similar Triangles

4. Applications of Similar Triangles

Similar triangles are used to solve problems in everyday situations. Learn how to solve with similar triangles here, and then test your understanding with a quiz.

Angle Bisector Theorem: Proof and Example

5. Angle Bisector Theorem: Proof and Example

The angle bisector theorem sounds almost too good to be true. In this lesson, we set out to prove the theorem and then look at a few examples of how it's used.

Triangle Congruence Postulates: SAS, ASA & SSS

6. Triangle Congruence Postulates: SAS, ASA & SSS

When we have two triangles, how can we tell if they're congruent? They may look the same, but you can be certain by using one of several triangle congruence postulates, such as SSS, SAS or ASA.

Perpendicular Bisector Theorem: Proof and Example

7. Perpendicular Bisector Theorem: Proof and Example

Perpendicular bisectors are multifunctional lines. They're not only perpendicular to the line in question, they also neatly divide it into two equal halves. In this lesson, we'll learn about the perpendicular bisector theorem.

Congruence Proofs: Corresponding Parts of Congruent Triangles

8. Congruence Proofs: Corresponding Parts of Congruent Triangles

Congruent triangles have congruent sides and angles, and the sides and angles of one triangle correspond to their twins in the other. In this lesson, we'll try practice with some geometric proofs based around this theorem.

The AAS (Angle-Angle-Side) Theorem: Proof and Examples

9. The AAS (Angle-Angle-Side) Theorem: Proof and Examples

When trying to find out if triangles are congruent, it's helpful to have as many tools as possible. In this lesson, we'll add to our congruence toolbox by learning about the AAS theorem, or angle-angle-side.

Congruency of Isosceles Triangles: Proving the Theorem

10. Congruency of Isosceles Triangles: Proving the Theorem

Isosceles triangles have two equal sides. Are the base angles also equal? In this lesson, we'll prove how this is true. We'll also prove the theorem's converse.

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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