Isaac Newton's Fitzwilliam Notebook (Diplomatic Version) Isaac Newton's catalog of his own sins from 1662, his expenses from 1666 and 1669, and notes on geometry. Some of his transgressions: "Making a mousetrap on Thy day," "Contriving of the chimes on...
GoGeometry: Incenter, Circumcenter, Centroid, Orthocenter: Journey to the Center of a Triangle. A 1977 instructional film illustrating how the different centers of a triangle are constructed....
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