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as well as isometric and parallel lines for technical drawing
As Dr Paul Swan says of these investigations in the Foreword to the book “For those unfamiliar with the Mathomat I suggest you purchase one and work through some of the activities contained in the book
The original instruction text book for Mathomat from 1972 is reproduced here
In secondary school:
Chemomat includes a 220mm ruler
91712 Ratios: 1: 125, 250, 400, 800, 1250, 2500, 4000, 8000 - Hand scale ruler, 300mm Printer as well as isometric andHand Scale, 300mm, 4 bevel Ratios: 1: 125, 250, 400, 800, 1200, 2500, 4000, 8000
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