 A polyhedron is called a prismatoid if it has for bases two polygons in parallel planes, and for lateral faces triangles or trapezoids with one side common with one base and the opposite vertex or side common with the other base.  Solid Geometry - Page 313by Wooster Woodruff Beman, David Eugene Smith - 1900 - 139 pagesFull view - About this book
 | John H. Williams, Kenneth P. Williams - Geometry, Solid - 1916 - 184 pages
...S=(F-2)4 rt. A. QED THE PRISMATOID FORMULA 782. A polyhedron is called a prismatoid if it has for bases two polygons in parallel planes, and for lateral faces triangles or trapezoids with one side common with one base and the opposite vertex or side common with the other base. 783.... | |
 | Mabel Sykes, Clarence Elmer Comstock - Geometry, Modern - 1918 - 576 pages
...two polygons in parallel planes, and for lateral faces triangles, trapezoids, or parallelograms that have one side in common with one base and the opposite vertex or side in common with the other base. The altitude of a prismatoid is the perpendicular distance between the bases. The mid-section of a... | |
 | Charles Austin Hobbs - Geometry, Solid - 1921 - 216 pages
...two polygons in parallel planes, and for lateral faces triangles, trapezoids, or parallelograms with one side in common with one base and the opposite vertex or side in common with the other base. The altitude of a prismatoid is the perpendicular distance between the bases. The mid-section of a... | |
 | Mabel Sykes, Clarence Elmer Comstock - Geometry, Solid - 1922 - 236 pages
...two polygons in parallel, planes, and for lateral faces triangles, trapezoids, or parallelograms that have one side in common with one base and the opposite vertex or side in common with the other base. The altitude of a prismatoid is the perpendicular distance between the bases. The mid-section of a... | |
 | Frank Moore Colby, Talcott Williams - Education - 1922 - 934 pages
...EtJCLASE. PRIS'MATOID (from Gk. тгр1вца, prisma, prism + eîîos, eidos, form). A polyhedron (qv) which has for bases any two polygons in parallel planes and for lateral faces triangles or trapezoide which have one side in common with one base and the opposite vertex or side in common with... | |
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