Quote: definitions of solid, perpendicular plane, pyramid, sphere

Quotation

BOOK ELEVEN DEFINITIONS 1. A solid is that which as length, breadth, and depth. 2. An extremity of a solid is a surface. ... 4. A plane is at right angles to a plane when the straight lines drawn, in one of the planes, at right angles to the common section of the planes are at right angles to the remaining plane. ... 12. A pyramid is a solid figure, contained by planes, which is constructed from one plane to a point. ... 14. When, the diameter of a semicircle remaining fixed, the semicircle is carried round and restored again to the same position from which it began to be moved, the figure so comprehended is a sphere.   Google-1   Google-2

Published before 1923

Additional Titles

Quote: sphere as the rotation of a semicircle

Related Topics

Topic: geometry (33 items)