j)+Using+a+Protractor

How do you use a protractor?

Posted by: **DummyDerrick**

A protractor is a tool that allows you to measure an angle or construct an angle of a given measure.

> > > > > > > > > The chart and site can be found here at: > > > > http://www.coolschool.ca/lor/EMA11/unit2/U02L05/protractor.htm
 * To measure an angle:**
 * 1) Find the center on the straight edge of the protractor.
 * 1) Place the center over the vertex, or point, of the angle you wish to measure.
 * 2) Line up the zero on the straight edge of the protractor with one of the sides of the angle.
 * 1) Find the point where the second side of the angle intersects the curved edge of the protractor.
 * 1) Read the number that is written on the protractor at the point of intersection. This is the measure of the angle in degrees. In this case, the angle is 50 degrees
 * Tips:**
 * There are 360 degrees in a circle.
 * A straight line measures 180 degrees.
 * The corner of a square measures 90 degrees. This is called a right angle.
 * Angles that measure less than 90 degrees are called acute angles. Those measuring more than 90 degrees are called obtuse angles.
 * To draw an angle**
 * 1) Draw the initial side of the angle and place the center of the protractorover the vertex of the angle you wish to draw.
 * 1) Mark a dot at the curved edge of the protractor for the measure of angle you wish to draw.
 * 1) Remove the protractor and join the vertex to the dot. You have drawn an angle of 70 degrees.

Posted by: **Craxyjosh** A video can be found on this link http://www.expertvillage.com/video/146919_use-protractor.htm http://ca.youtube.com/watch?v=JgB5YE7ztR0