Page "Compass and straightedge constructions" Paragraph 83
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* Math Tricks Help You Design Shop Projects: master a simple compass and you're a designer ; convert your router into one with a trammel and away you go, Popular Science, May 1971, p104, 106, 108, Scanned article via Google Books: http :// books. google. com / books? id = ngAAAAAAMBAJ & pg = PA104
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