to inscribe an angle
1Pythagorean theorem — See also: Pythagorean trigonometric identity The Pythagorean theorem: The sum of the areas of the two squares on the legs (a and b) equals the area of the square on the hypotenuse (c) …
2Sundial — A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating… …
3mathematics — /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,… …
4Area of a disk — Part of a series of articles on the mathematical constant π …
5Flag of Romania — Infobox flag Name = Romania Article = Use = 111111 Symbol = Proportion = 2:3 Adoption =26 June 1848 1 July 1866 27 December 1989 16 July 1994 Design = A vertical tricolour of blue, yellow, and red, with stripes of equal width and blue near the… …
6Arc length — Determining the length of an irregular arc segment is also called rectification of a curve. Historically, many methods were used for specific curves. The advent of infinitesimal calculus led to a general formula that provides closed form… …
7Lincoln, Abraham — born Feb. 12, 1809, near Hodgenville, Ky., U.S. died April 15, 1865, Washington, D.C. 16th president of the U.S. (1861–65). Born in a Kentucky log cabin, he moved to Indiana in 1816 and to Illinois in 1830. After working as a storekeeper, a rail… …
8Fiber Bragg grating — A fiber Bragg grating (FBG) is a type of distributed Bragg reflector constructed in a short segment of optical fiber that reflects particular wavelengths of light and transmits all others. This is achieved by adding a periodic variation to the… …
9arts, East Asian — Introduction music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature. Some studies of East Asia… …
10Pentagon — In geometry, a pentagon is any five sided polygon. A pentagon may be simple or self intersecting. The internal angles in a simple pentagon total 540°. Regular pentagons The term pentagon is commonly used to mean a regular convex pentagon, where… …
