| Edward Rutledge Robbins - Geometry - 1907 - 428 pages
...faces. The total area of a pyramid is the sum of the lateral area and the area of the base. The altitude of a pyramid is the perpendicular distance from the vertex to the plane of the base. A triangular pyramid is a pyramid whose base is a triangle. It is called also a... | |
| Herbert Ellsworth Slaught, Nels Johann Lennes - Geometry, Solid - 1911 - 208 pages
...tetrahedron. In this case every face is a triangle, and any one may be taken as the base. The altitude of a pyramid is the perpendicular distance from the vertex to the base. A regular right pyramid, or simply a regular pyramid, is one whose base is a regular polygon... | |
| Fletcher Durell, Elizabeth Hall - Arithmetic - 1912 - 404 pages
...vertex. The triangles which meet at the vertex taken together form the lateral surface. The altitude of a pyramid is the perpendicular distance from the vertex to the base. A pyramid is triangular, quadrangular, pentagonal, etc., according as the base is a triangle,... | |
| John H. Williams, Kenneth P. Williams - Geometry, Solid - 1916 - 184 pages
...the lateral edges. The sum of the areas of the lateral faces is called the lateral area. The altitude of a pyramid is the perpendicular distance from the vertex to the plane of the base. 610. Pyramids are said to be triangular, quadrangular, and so on, according as their... | |
| Herbert Edwin Hawkes, William Arthur Luby, Frank Charles Touton - Geometry, Solid - 1922 - 216 pages
...sum of the areas of the lateral faces is the lateral area of the pyramid. 512. Altitude. The altitude of a pyramid is the perpendicular distance from the vertex to the plane of the base. QUERY 1. Can the altitude of a pyramid be equal to one of the lateral edges? SOLID... | |
| Encyclopedias and dictionaries - 1928 - 1958 pages
...whose sides are triangles which have a common vertex, called the vertex of the pyramid. The altitude of a pyramid is the perpendicular distance from the vertex to the base. The volume of a pyramid is equal to the onethird the volume of a prism having the same base and... | |
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