Khan Academy
Khan Academy: Triangles: Triangle Angle Example 1
Explains how to use the triangle sum theorem to solve for missing angle measures in a triangle. A little about exterior angles being the sum of the remote interior angles. Also shows the relationship between the measure of an exterior...
Khan Academy
Khan Academy: Geometry: Angles of Parallel Lines 2
Explains how to determine the measures of all the angles formed when parallel lines are cut by a transversal based on the measure of one angle. Explains how to use corresponding congruent angles to determine if lines cut by a transversal...
Khan Academy
Khan Academy: Geometry: Angles Formed Between Transversals and Parallel Lines
Explains the relationship between the measures of angles formed when parallel lines are cut by a transversal based on relationships of corresponding, vertical, and supplementary angles. [7:53]
Khan Academy
Khan Academy: Angles (Part 2)
More on complementary and supplementary angles. Introduction to opposite angles.
Sophia Learning
Sophia: Consecutive Exterior Angles Converse
This video lesson demonstrates how to determine if two lines are parallel by using the converse of the consecutive-exterior angles theorem. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Consecutive Exterior Angles Converse
This video lesson demonstrates how to determine if two lines are parallel by using the converse of the consecutive-exterior angles theorem. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Supplementary Angles
This video lesson defines and provides examples of supplementary angles. Students can check their understanding with an assessment. [1:40]
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...