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.
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.
Angles, Arcs and Sectors: Introduction to Angles
This clip explains what constitutes an angle and provides a brief discussion of the fields in which angle measurement is especially critical. The clip then defines a number of terms that are fundamental to understanding angles, including "vertex" an...
Angles, Arcs and Sectors: Complementary and Supplementary Angles
This clip explains that any two angles that have a sum of 90 degrees are called complementary angles. The clip adds that knowing two angles are complementary allows us to find the measure of one angle when we know the measure of the other. The clip ...
Angles, Arcs and Sectors: Different Types of Angles
This clip introduces some of the most common angles, including the 90-degree angle (also known as the right angle), the 180-degree angle (also known as the straight angle), the acute angle and the obtuse angle.
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...