Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 76
ecahedron,bounded by twelve regular pentagons. , (5) The icosahedron, bounded by twenty equilateral triangles./ 49. Development. If the surface of a given solid can beflattened out on a plane without distortion, that surface is said H ad A bV a. ft A /1 \/ • \ / j \ I < ^^ ^ a c FiQ. 54 V, § 49]… … FiQ. 55 In Fig. 54, for example, the plan and elevation of a squarepyramid are shown. To develop the surface, let each of thesloping faces be rotated outward, until they fall in the plane ofthe base. The figure o*e— d*/ is the required development. \ J •■yr--- —-r»—--- --P* ■* A i(.,^:^..jy...:^^…
Geometry, Descriptive
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