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About ProRadian Protractors

ProRadian protractors help you understand radians better. Radian measure is a fundamental concept in geometry, trigonometry, calculus, and physics – yet most students, and many teachers, do not understand it. These new protractors let you learn about radians in the same way you learned about degrees – by measuring. A learning set contains two protractors, one scaled in 0.1 radians and one scaled in π/24 radians. This allows you to make connections to the output of your calculator in radian mode and to the unit circle. It also reinforces the numeric value of π. Starting to measure with radians in Geometry means that you will have one of the big hurdles in Trigonometry conquered! Besides, things like the patterns of numbers you find in regular polygons are cool in terms of π. ProRadian Pro is scaled in 0.01 radians, making it a precise measurement tool for work or school. It was made at the request of an engineer who bought ProRadian 1 but wanted a finer scale for measuring.

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