Triangle Sum Theorem
Discovering Triangle Sum Theorem
Move around points A, B, and C to form at least three different types of triangles. Record the sum of the interior angles for each triangle you create.
Add the angles of the triangle you created
A + B + C = ?
Change the angles of your triangle. Add the angles of this 'different' triangle.
A + B + C = ?
Change the angles of the triangle one more time. Add the angles of this third triangle.
A + B + C = ?
What do you notice about the sum of all three interior angles for each triangle you created?