# Ch 5: Triangles, Theorems and Proofs: Help and Review

The Triangles, Theorems and Proofs chapter of this High School Geometry Help and Review course is the simplest way to master triangles, theorems and proofs. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of triangles, theorems and proofs.

## Who's it for?

Anyone who needs help understanding high school geometry material from will benefit from taking this course. You will be able to grasp the subject matter faster, retain critical knowledge longer and earn better grades. You're in the right place if you:

• Have fallen behind in understanding triangles, theorems and proofs.
• Need an efficient way to learn about triangles, theorems and proofs.
• Learn best with engaging auditory and visual tools.
• Struggle with learning disabilities or learning differences, including autism and ADHD.
• Experience difficulty understanding your teachers.
• Missed class time and need to catch up.
• Can't access extra math learning resources at school.

## How it works:

• Start at the beginning, or identify the topics that you need help with.
• Watch and learn from fun videos, reviewing as needed.
• Refer to the video transcripts to reinforce your learning.
• Test your understanding of each lesson with short quizzes.
• Submit questions to one of our instructors for personalized support if you need extra help.
• Verify you're ready by completing the Triangles, Theorems and Proofs 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 Triangles, Theorems and Proofs chapter exam to be prepared.
• Get Extra Support: Ask our subject-matter experts any relevant question. They're here to help!
• Study With Flexibility: Watch videos on any web-ready device.

## Students will review:

In this chapter, you'll learn the answers to questions including:

• What are the guiding principles behind the ASA, SAS and SSS postulates?
• How do congruent proofs work?
• What is the converse of a statement?
• How do the AAS, HA and HL proofs work?
• What are the guiding principles behind the angle and perpendicular theorems?
• What procedures are used to prove the congruency of isosceles and right triangles?

21 Lessons in Chapter 5: Triangles, Theorems and Proofs: Help and Review
Test your knowledge with a 30-question chapter practice test
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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