Transcription: Descriptive geometry was graphical technique used for the analysis of lines and planes in three dimensions. Its principles enabled an engineer to obtain true lengths, true shapes, true angles, distances, and intersection shapes from any two orthogonal views, and then recreate them in any view. Descriptive geometry was a closely guarded military secret for many years. Its disclosure was an offense punisherl-oidez. With its expertise, France remained the prime military power in Europe until the early 20th century, when improved ordination mobile mechanized armies and air power once again made fo ...
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