# Ch 9: McDougal Littell Pre-Algebra Chapter 9: Real Numbers and Right Triangles

The Real Numbers and Right Triangles chapter of this McDougal Littell Pre-Algebra textbook companion course helps students learn the essential pre-algebra lessons of real numbers and right triangles. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Real Numbers and Right Triangles textbook chapter.

## How it works:

• Identify the lessons in the McDougal Littell Pre-Algebra Real Numbers and Right Triangles chapter with which you need help.
• Find the corresponding video lessons within this companion course chapter.
• Watch fun videos that cover the real numbers and right triangles 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:

• Finding the square root of a number
• Estimating the square root of a number
• Simplifying imperfect squares
• Applying the Pythagorean Theorem
• Simplifying expressions with numbers and variables in a square root
• Using the distance and midpoint formulas
• Identifying properties of special right triangles
• Using sing, cosine and tangent ratios

McDougal Littell Pre-Algebra is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

9 Lessons in Chapter 9: McDougal Littell Pre-Algebra Chapter 9: Real Numbers and Right Triangles
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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