Use a ruler, protractor and a pair of compasses to construct a triangle accurately. After the triangle has been constructed, leave the construction lines visible so each stage of the process is shown ...
https://doi.org/10.4169/amer.math.monthly.124.1.70 https://www.jstor.org/stable/10.4169/amer.math.monthly.124.1.70 We provide a geometric explanation, based on ...
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