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Geometry: Special Segments in Triangles
by Texas Instruments - Create Your own
TI Math Lesson

Updated on October 06, 2014

Objectives

  • Students will show why certain segments in triangles are medians, angle bisectors, altitudes, or perpendicular bisectors.
  • Students will interpret what properties these particular segments have.
  • Students will attend to precision (CCSS Mathematical Practice).
  • Students will use appropriate tools strategically (CCSS Mathematical Practice).

Vocabulary

  • median
  • angle bisector
  • altitude
  • perpendicular bisector

About the Lesson

In this activity, students will investigate 4 special segments from a given vertex in a triangle and identify relationships among the special segments and the angles that they form. You decide if you want students to create the figure or to use a figure that has already been created. If you want students to create the figure, give each student a copy of the "Create" handout. This will explain clearly how to create the necessary figure.