01:57
Angles, Arcs and Sectors: Parallel Lines Intersected by a Transversal
This clip explains that several angles are created when a transversal intersects two parallel lines. The clip then defines alternate interior angles and corresponding angles.
02:51
Angles, Arcs and Sectors: Angles Formed by Intersecting Lines
This clip looks at angles that are formed by two intersecting lines, in the process explaining what constitutes vertical and supplementary angles.
02:49
Angles, Arcs and Sectors: Calculating Many Angles When Only One is Known
This clip explains how to use what we know about special angle relationships to find the measure of several angles when we known the measure of just one. The explanation covers vertical angles, alternate interior angles, corresponding angles, supple...