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## The Secondary Elements of a Triangle

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### Lesson Focus

#### The Secondary Elements of a Triangle

Math Foundations

You get to learn all about triangles, including the six different types–and some main components and unique properties of each type.

### Now You Know

After completing this tutorial, you will be able to complete the following:

• Identify the secondary elements (medians, altitudes, and angle bisectors) of a triangle.

### Everything You'll Have Covered

What are the keywords and their definitions? What did you have the most difficulty understanding?

Answers will vary. Keywords and definitions include:

~ Secondary elements of a triangle: The altitudes, medians, and angle bisectors of a triangle.

~ Median of a triangle: a line segment from a vertex to the midpoint of the side opposite that vertex

~ Altitude of a triangle: a perpendicular line segment from a vertex to a side opposite that vertex.

~ Angle bisector of a triangle: a line segment from a vertex to the side opposite the vertex that also bisects the interior angle.

### Tutorial Details

 Approximate Time 2 Minutes Pre-requisite Concepts Students should famililar with altitudes of a triangle, angle bisectors of a triangle, and medians of a triangle. Course Math Foundations Type of Tutorial Animation Key Vocabulary altitudes of a triangle, angle bisectors of a triangle, medians of a triangle