Triangle Sum Theorem


Add the measures of angle A, B and C. What is the sum of these angles?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

Move points A, B and C so that the triangle has new angle measures. Find the sum of the interior angles, A, B and C. What do you notice?

What can be concluded about the interior angles of a triangle?