Art of Problem Solving
Art of Problem Solving: Introduction to Angles
Video tutorial uses examples to provide an introduction to angles including right, acute, and obtuse angles. [8:22]
Art of Problem Solving
Art of Problem Solving: Angles in a Triangle Part 1
Video tutorial uses problems to reinforce understanding that the angles in a triangle always add up to 180 degrees. (Part 1) [3:55]
Khan Academy
Khan Academy: Angles in a Triangle Sum to 180 Degree Proof
Learn the formal proof that shows the measures of interior angles of a triangle sum to 180 degrees.
Loyola University Chicago
Math Flix: Congruent Angles
This QuickTime movie provides an opportunity to learn about congruent/vertical angles. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Loyola University Chicago
Math Flix: Complementary/supplementary Angle Computation
This QuickTime movie provides an opportunity to learn about computing the total degrees for complementary and supplementary angles. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying...