Geometry 5th

^p120

^{Measure of angles. Plane angles and full (complete) angles.}

^{See how is measured the angle A with the protractor}

^{*First: place the protractor so that the Center coincides with the vertex of the angle}

^{*Second:  look on the protractor the number through which passes the other side of the angle. This number is his measure in degrees. The angle A measures 45 degrees.} 

^{*Concentrate on the name that these angles have and what measure they have.} 

 

^{Flat angle. It measures 180 degrees and the sides are in the same straight line.}

^{Full (Complete) angle. It measures 360 degrees and the sides coincide.}