# Ch 15: Triangle Properties & Proofs

Use the lessons in this chapter to refresh your understanding of the various types of triangles and their properties and proofs. These videos, quizzes and other study tools can support you in getting ready for an upcoming test.

## Triangle Properties & Proofs Chapter - Chapter Summary

This chapter provides a synopsis of your knowledge of triangle properties, proofs, and theorems. The video lessons include definitions and examples for topics like identifying similar triangles, and they show the applications of the Pythagorean theorem. You'll also review proofs of congruent triangles, as well as exterior and interior angles of a triangle. By the end of this chapter, you will be proficient in doing the following:

• Define and classify triangles and their properties
• Solve for the area and perimeter of triangles and rectangles
• Explain the interior and exterior angles of triangles
• State the Pythagorean theorem and the converse of the Pythagorean theorem
• Define geometric proofs
• Prove relationships using congruence and similarity

The brief video lessons break down these concepts into bite-sized chunks, which makes it easier to commit these triangle properties and proofs to memory. All the lessons are taught by professional mathematics instructors, and you'll also have access to self-assessment quizzes and transcripts of all the video lessons. Through your Dashboard, you can track your progress through the chapter.

12 Lessons in Chapter 15: Triangle Properties & Proofs
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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