Google Classroom
GeoGebraGeoGebra Classroom

Measuring and constructing angles

Topic:
Angles

Watch the following video that briefly and successfully explains complementary angles.

Complementary angles - slide the pink dot along the line to adjust the size of each angle. Use a protractor to measure each angle. Add the two angle sizes together to find the combinations of 90 degrees (complementary angles). Slide the black dot to obser