Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 98
solve a certain geometricproblem. Descartes solved it with little diflBculty and is said to haverealized then that he had no taste for military life. He soon resigned hiscommission and spent five years in travel and study. After this he liveda short time in Paris, but soon retired to Holland, where… … Descartes 88 PLANE GEOMETRY Proposition XXXIII. Theorem 238. Tim diagonals of a parallelogram bisect eachother.
Geometry, Plane · Geometry, Solid
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
![An illustration from XVIIme [i.e. dix-septième] siècle : lettres, sciences et arts, France, 1590-1700 (1882)](https://img.insideoutlibrary.com/img/200/ia-xviimeiedixsepti00jaco-62-24.webp)
![An illustration from A short history of engraving [and] etching : for the use of collectors and students; with full bibliography, classified list and index of engravers (1908)](https://img.insideoutlibrary.com/img/200/ia-shorthistoryofen00hinduoft-182-57.webp)