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See The New Mathomat R300 Ruler

The Windmill Angle Tester


The windmill angle tester can be printed from the Mathomat Explorer manual support site.
Students begin the angle section by learning to make a windmill angle tester using Mathomat. Students use their angle tester to compare the relative sizes of different real-life angles in the wild. The 12 windmill angle units in the tester give it a similar structure to the Mathomat protractor, students are invited to explore this relationship. Degrees as a formal angle measurement unit are introduced, along with the underlying concept of what an angle actually is.