Lesson: Types of Triangles: Angles Mathematics • 3rd Grade

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In this lesson, we will learn how to classify triangles as acute, right, or obtuse by considering the size of their angles.

Lesson Plan

Students will be able to

  • classify triangles as acute, right, or obtuse,
  • count acute, right, and obtuse angles in triangles,
  • sort triangles into groups.

Lesson Playlist

  • The Possible Types of the Interior Angles of a Triangle
    02:27

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