1) triangle, in mathematics. The Columbia Encyclopedia, Sixth Edition. 2001 ...Any one of the sides may be considered the base of the triangle. The perpendicular distance from a base to the opposite vertex is called an altitude. The area of... 2) Bermuda Triangle. The Columbia Encyclopedia, Sixth Edition. 2001 ...Bermuda Triangle, area in the Atlantic Ocean off Florida where a number of ships and aircraft have vanished. Also known as the Devil's Triangle, it is bounded at... 3) Research Triangle Park. The Columbia Encyclopedia, Sixth Edition. 2001 ...Research Triangle Park, research, business, medical, and educational complex situated in central North Carolina. It has an area of 6,900 acres (2,795 hectares) and... 4) triangle, in music. The Columbia Encyclopedia, Sixth Edition. 2001 ...Only since the end of the 18th cent. has it been an orchestral instrument, although it appeared in Europe much earlier. Its tinkling sound is of indefinite pitch... 5) trigonometry. The Columbia Encyclopedia, Sixth Edition. 2001 ...Spherical trigonometry is concerned with the study of triangles on the surface of a sphere rather than in the plane; it is of considerable importance in surveying,... 6) non-Euclidean geometry. The Columbia Encyclopedia, Sixth Edition. 2001 ...Euclidean geometry, branch of geometry in which the fifth postulate of Euclidean geometry, which allows one and only one line parallel to a given line through a given... 7) proportion. The Columbia Encyclopedia, Sixth Edition. 2001 ...Two pairs of quantities a,b and c,d are in proportion if their ratios a/b and c/d are equal, i.e., if the equation a/b=c/d is true. For example, the lengths of two... 8) food pyramid. The Columbia Encyclopedia, Sixth Edition. 2001 ...Food Guide Pyramid, diagram used in nutrition education that fits food groups into a triangle and notes that, for a healthful diet, those at the base should be eaten... 9) Yukon Territory. The Columbia Encyclopedia, Sixth Edition. 2001 ...Yukon Territory, territory (1991 pop. 27,797), 207,076 sq mi (536,327 sq km), NW Canada. 1 Geography and ClimateThe triangle-shaped Yukon territory is bordered on... 10) Big Bend National Park. The Columbia Encyclopedia, Sixth Edition. 2001 ...Big Bend National Park, 801,163 acres (324,471 hectares), W Tex.; authorized 1935, est. 1944. It is a triangle formed where the Rio Grande runs southeast then northeast... |