Plato's Protractor™ - II
In Plato’s protractor II the Mathomat kids encounter a unit of angle measure called quips. There are 15 quips in a full rotation. This odd number means that a quips protractor, which the Mathomat kids are asked to construct, cannot be made through paper folding. To make their protractors students need to measure out the angle size as distance travelled along the circumference of the protractor. This encourages students to connect angle measure with arc length.