A plane superficies is that in which any two points being taken, the straight line between them lies wholly in that superficies. vm. "A plane angle is the inclination of two lines to one another in a plane, which meet together, but are not in the same...
The synoptical Euclid; being the first four books of Euclid's Elements of ... - Página 1
por Euclides - 1853
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