Khan Academy Static

One complete revolution is divided into 360 equal parts. Each part is a degree, and angles are measured in degrees. A right angle is 90 degrees and a straight angle is 180 degrees. In this topic we will learn how to measure angles in degrees. We will also learn how to use a protractor and to solve for unknown angles.

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8136_Measuring_angles_using_a_protractor.html

8135_Measuring_angles_in_degrees.html

8138_Decomposing_an_angle.html

8139_Drawing_acute_right_and_obtuse_angles.html