Basic Math Reference Sheet
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A Collapsible Compass
Sometimes an article or an activity provides the stimulus for further investigations or explorations. Such was my reaction when I first read that a “collapsible compass” was used by Euclid instead of a “modern compass” to deduce his theorems in his book, Elements, which is considered one of the most influential works in the history of mathematics. You may use this activity to challenge yourself to show the equivalence of the “collapsible compass” with the “modern compass,” or challenge your m
9th - 12th
Geometry
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