Grade 8 Mathematics Module 2, Topic C, Lesson 13


Student Outcomes

  • Students know the Angle Sum Theorem for triangles; the sum of the interior angles of a triangle is always 180 degrees.
  • Students present informal arguments to draw conclusions about the angle sum of a triangle.

Downloadable Resources

Common Core Learning Standards

CCLS State Standard
8.G.5 Use informal arguments to establish facts about the angle sum and exterior angle of triangles,...

Curriculum Map