Khan Academy Static

These are some of the classic, original angle video that Sal had done way back when (like 2007). Other tutorials are more polished than this one, but this one has charm. Also not bad if you're looking for more examples of angles between intersected lines, transversals and parallel lines.

3723_Angles_part_2_.html

3727_The_angle_game.html

3724_Angles_part_3_.html

3722_Intro_to_angles_old_.html

3729_Acute_right_obtuse_angles.html

3726_Angles_of_parallel_lines_2.html

3725_Angles_formed_between_transversals_and_parallel_lines.html

3728_The_angle_game_part_2_.html