Ch 41: AEPA Middle Grades Math: Triangles

About This Chapter

Arizona has replaced the AEPA Middle Grades Math exam with the National Evaluation Series (NES) Middle Grades Mathematics test. As you prepare for this NES test, watch our short video lessons to review the geometric properties of triangles.

AEPA Middle Grades Math: Triangles - Chapter Summary

In this chapter, cover the basics of triangles as you prepare for the NES Middle Grades Mathematics exam. These lessons will ensure you can:

  • List and define the properties of triangles
  • Classify triangles by angles and sides and identify interior and exterior angles
  • Recognize similar triangles
  • Understand median, altitude and angle bisectors
  • Construct triangles using sides, angles, a compass and a ruler
  • Explain the properties of concurrent lines in a triangle

The engaging video lessons help you cover material quickly, and you can easily review a single topic using the video tags. The lesson transcript is also right there if you need to check terminology or a quick fact, and subject experts are available should you have a question. Use the short self-assessment quizzes throughout the chapter to make sure you are on track as you prepare for the NES Middle Grades Mathematics exam.

9 Lessons in Chapter 41: AEPA Middle Grades Math: Triangles
Test your knowledge with a 30-question chapter practice test
Triangles: Definition and Properties

1. Triangles: Definition and Properties

What makes a shape a triangle? In this lesson, we'll explore the definition of a triangle, then analyze the parts of triangles, including the vertices, base and height.

Classifying Triangles by Angles and Sides

2. Classifying Triangles by Angles and Sides

Not all triangles are the same. There are equilateral, isosceles and scalene triangles. Then there are right, acute and obtuse triangles. In this lesson, we'll learn how to classify triangles using their sides and angles.

Interior and Exterior Angles of Triangles: Definition & Examples

3. Interior and Exterior Angles of Triangles: Definition & Examples

Knowing just a few things about the interior or exterior angles of triangles is sometimes all you need to put all the pieces together. Find out more in this lesson.

How to Identify Similar Triangles

4. 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.

Angles and Triangles: Practice Problems

5. Angles and Triangles: Practice Problems

Want more practice solving with angle pairs? How about more review for solving angles in triangles? Look no further. Get more practice here, and test your ability with a quiz.

Constructing the Median of a Triangle

6. Constructing the Median of a Triangle

If you have one triangle and want to divide it, you can use a median line. Medians have special geometric properties that we'll learn about in this lesson.

Median, Altitude, and Angle Bisectors of a Triangle

7. Median, Altitude, and Angle Bisectors of a Triangle

Line segments in triangles are just clutter; they have special names and qualities depending on how they're drawn. In this lesson, we'll learn about medians, altitudes and angle bisectors.

Constructing Triangles: Types of Geometric Construction

8. Constructing Triangles: Types of Geometric Construction

When you're asked to construct a triangle, it's time to break out that compass and straight edge! In this lesson, find out how to construct triangles no matter what you're given.

Properties of Concurrent Lines in a Triangle

9. Properties of Concurrent Lines in a Triangle

Centroids, orthocenters, incenters, circumcenters, oh my! Don't worry though. In this lesson, we master the various terms for concurrent lines in triangles and match them to altitudes, angle bisectors, perpendicular bisectors and medians.

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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Other Chapters

Other chapters within the AEPA Middle Grades Mathematics (NT203): Practice & Study Guide course

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