Frequencies of Free Oscillations of a Truncated Spherical Sector Covered with a Thin Elastic Spherical Shell
- Volumes, Areas and Lenghts Interrelated Through Derivatives. Litwiller, Bonnie H.; Duncan, David R. // New York State Mathematics Teachers' Journal;2005, Vol. 55 Issue 2, p84
The article explains how volumes, areas and lengths are interrelated through derivatives. Through derivatives the surface areas of the sphere, circle and the cube are obtained using the volume formulas.
- Sommerville's Missing Tetrahedra. Allan L. Edmonds // Discrete & Computational Geometry;Feb2007, Vol. 37 Issue 2, p287
Abstract??D.M.Y. Sommerville's 1923 classification of tetrahedra that can tile 3-space in a proper, face-to-face manner is completed, by showing that the case he failed to consider cannot occur, although it does occur in non-proper and in non-face-to-face tilings.
- How Many SIDES and FACES Do They Have? // World Almanac for Kids;1997, p152
Provides diagrams of different shapes, both two-dimensional and three-dimensional. Diagram of a square, a cube, a sphere, a circle, etc.
- conÂ·cave. // American Heritage Student Science Dictionary;2009, p78
A definition of the term "concave" is presented. It means curved inward, like the inside of a circle or sphere.
- sphere. // Taber's Cyclopedic Medical Dictionary;2005, p2041
The article presents a definition for the term "sphere," which refers to a ball or globelike structure.
- WHAT ARE POLYHEDRONS? // World Almanac for Kids;2001, p173
This article provides drawings of different polyhedrons. A polyhedron is a three-dimensional figure with four or more faces. Each face on a polyhedron is a polygon. Below are some polyhedrons with many faces.
- Two Unsolved Geometric Problems. Makeev, V. V. // Journal of Mathematical Sciences;Jan2004, Vol. 119 Issue 2, p245
Two familiar unsolved geometric problems are discussed: on functions on the 2-sphere and on quadrangles inscribed in a smooth planar Jordan curve. A related question on equipartitioning a mass on a plane is also discussed. Bibliography: 6 titles.
- How Many SIDES and FACES Do They Have? // World Almanac for Kids;1999, p150
No abstract available.
- cirÂ·cle. // American Heritage Student Science Dictionary;2009, p70
A definition of the term "circle" is presented. It refers to a closed curve whose points are all on the same plane and at the same distance from a fixed point. A diagram of a circle is outlined.