Radian Measure with a ProRadian Protractor
- Jennifer Silverman
This applet simulates an activity you can do with a radian scale protractor. Draw a line on a strip of paper and make a mark at one end. Place the zero of ProRadian 1 on the mark, and roll it along the strip. Every time an integer value "touches" the paper, make another mark on the strip. In the end, you'll have a "ruler" whose scale equals the radius of the protractor.
At what value does it stop rolling? If it was a full circle, where would one full roll end?