Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 85
RniEUE. SPHERE. TANGENT PLANE. Tho altitude of a frustum of a cone is the perpendiculardistance between the bases. SPHERES. . A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center. The radius of a sphere is a straight line…
Architecture · Building · Carpentry
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