**Equilateral** — E qui*lat er*al, a. [L. aequilateralis; aequus equal + latus, lateris, side: cf. F. [ e]quilat[ e]ral.] Having all the sides equal; as, an equilateral triangle; an equilateral polygon. [1913 Webster] {Equilateral hyperbola} (Geom.), one whose… … The Collaborative International Dictionary of English

**Equilateral hyperbola** — Equilateral E qui*lat er*al, a. [L. aequilateralis; aequus equal + latus, lateris, side: cf. F. [ e]quilat[ e]ral.] Having all the sides equal; as, an equilateral triangle; an equilateral polygon. [1913 Webster] {Equilateral hyperbola} (Geom.),… … The Collaborative International Dictionary of English

**Equilateral shell** — Equilateral E qui*lat er*al, a. [L. aequilateralis; aequus equal + latus, lateris, side: cf. F. [ e]quilat[ e]ral.] Having all the sides equal; as, an equilateral triangle; an equilateral polygon. [1913 Webster] {Equilateral hyperbola} (Geom.),… … The Collaborative International Dictionary of English

**Malfatti circles** — In geometry, the Malfatti circles are three circles inside a given triangle such that each circle is tangent to the other two and to two sides of the triangle. They are named after Gian Francesco Malfatti, who made early studies of the problem of … Wikipedia

**mathematics** — /math euh mat iks/, n. 1. (used with a sing. v.) the systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically. 2. (used with a sing. or pl. v.) mathematical procedures,… … Universalium

**combinatorics** — /keuhm buy neuh tawr iks, tor , kom beuh /, n. (used with singular v.) See combinatorial analysis. * * * Branch of mathematics concerned with the selection, arrangement, and combination of objects chosen from a finite set. The number of possible… … Universalium

**Golden ratio** — For the Ace of Base album, see The Golden Ratio (album). Not to be confused with Golden number. The golden section is a line segment divided according to the golden ratio: The total length a + b is to the length of the longer segment a as the… … Wikipedia

**N-body problem** — otheruses4|the problem in classical mechanics|the problem in quantum mechanics|Many body problem The n body problem is the problem of finding, given the initial positions, masses, and velocities of n bodies, their subsequent motions as determined … Wikipedia

**Close-packing of spheres** — hcp and fcc close packing of spheres In geometry, close packing of spheres is a dense arrangement of equal spheres in an infinite, regular arrangement (or lattice). Carl Friedrich Gauss proved that the highest average density – that is, the… … Wikipedia

**Disphenoid** — The tetragonal and digonal disphenoids can be positioned inside a cuboid bisecting two opposite faces. All four faces are isosceles triangles. Both have four equal edges going around the sides. The digonal has two sets of isosceles triangle faces … Wikipedia