Posts tagged 'sphere'
G.575 sphere
When, the:term:diameter <G.61> of a:term:semicircle <G.96> remaining fixed, the semicircle is carried round and restored again to the same position from which it began to be moved, the:term:figure <G.9> so comprehended is a:term:**sphere** <sphere>.
G.576 diameter of a sphere
A:term:**diameter of the sphere** <diameter-of-sphere> is any:term:segment <G.4> drawn through the:term:center <center> and terminated in both directions by the:term:surface <G.533> of the:term:sphere <G.575>.
G.577 spheres center inscribe
Given two spheres about the same center, to inscribe in the greater sphere a polyhedral solid which does not touch the lesser sphere at its surface.
G.578 spheres triplicate ratio
Spheres are to one another in the triplicate ratio of their respective diameters.
G.591 axis of a sphere
The:term:**axis of the sphere** <axis-of-sphere> is the:term:segment <G.4> which remains fixed and about which the:term:semicircle <G.96> is turned.
G.592 construct pyramid comprehend
To construct a :term:`pyramid <G.553>`, to comprehend it in a given :term:`sphere <G.575>`, and to prove that the :term:`square <G.63>` on the :term:`diameter of the sphere <G.576>` is one and a half times the square on the side of the pyramid.
G.594 construct an octahedron and comprehend it in a
Construct an octahedron and comprehend it in a sphere, as in the preceding case; and to prove that the square on the diameter of the sphere is double of the square on the side of the octahedron.
G.595 construct a cube and comprehend it in a
Construct a cube and comprehend it in a sphere, like the pyramid; and to prove that the square on the diameter of the sphere is triple of the square on the side of the cube.
G.597 construct an icosahedron and comprehend it in a
Construct an icosahedron and comprehend it in a sphere, like the aforesaid figures; and to prove that the side of the icosahedron is the irrational segment called minor.
G.598 center of a sphere
The:term:**center of the sphere** <center-of-sphere> is the same as that of the:term:semicircle <G.96>.
G.600 construct a dodecahedron and comprehend it in a
Construct a dodecahedron and comprehend it in a sphere, like the aforesaid figures, and to prove that the side of the dodecahedron is the irrational segment called apotome.
G.601 set out sides
To set out the sides of the five figures and to compare them with one another.