Angles are defined, and animated graphics show how angles are formed.
Special attention is given to explaining what degrees are and how they are used to measure angles.
Animations show how to use a protractor to measure and to construct angles. Straight angles, right angles, acute angles, and obtuse angles are defined and illustrated. The relationship between degrees of angle and the cardinal points on a compass illustrates how angles are used to navigate. A second example shows why a knowledge of angles is essential in the construction of a picture frame. The program addresses angles, degrees, how angles are measured, and why angles are important.