# Ch 9: McDougal Littell Geometry Chapter 9: Right Triangles and Trigonometry

The Right Triangles and Trigonometry chapter of this McDougal Littell Geometry Textbook companion course helps students learn essential geometry lessons of right triangles and trigonometry. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Right Triangles and Trigonometry textbook chapter.

## How it works:

• Identify the lessons in the McDougal Littell Geometry Textbook Right Triangles and Trigonometry chapter with which you need help.
• Find the corresponding video lessons within this companion course chapter.
• Watch fun videos that cover the right triangles and trigonometry 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:

• Properties of right triangles
• Proportions in right triangles
• Using a geometric mean to solve problems
• The Pythagorean theorem in practice and application
• The Pythagorean theorem: converse and special cases
• Classifying triangles by angle measures
• Types and properties of special right triangles
• Side lengths of special right triangles
• Introduction to sines, cosines and tangents
• Trigonometric ratios and similarity
• Practice finding the trigonometric ratios
• Solving right triangles
• Problems requiring solving right triangles
• Definition and types of vectors
• Finding the magnitude of a vector
• Explanation and examples of vector addition with a geometric approach

McDougal Littell Geometry is a registered trademark of McDougal Littell, which is not affiliated with Study.com.

6 Lessons in Chapter 9: McDougal Littell Geometry Chapter 9: Right Triangles and Trigonometry
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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