Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 82
t saying that it is a certain fraction of a circumference, the cir-cumference is divided into 3G0equal parts called degrees. Thuswe can say that an angle contains45 degrees, which means that it is-^f-Q r= I of a circumference. Inorder to obtain accurate measure-ment$ each degree is divided into60… … SOLIDS. A polyedron is a solid bounded by planes. The boundingplanes are called the faces and their intersections edges. Theintersections of the ed^es are called vertices. A polygon having four faces is called a tetraedron; one havingsix faces a hexaedron; of eight faces an octaedron; of…
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