make right-angled
31square — I (New American Roget s College Thesaurus) n. tetragon, quadrilateral, equilateral rectangle; block; quadrangle; plaza, court; T square; slang, misfit, fogy. See numeration, measurement, angularity, permanence. v. t. quadrate; balance, settle,… …
32Brickwork — Dismantled wall showing brickwork Decorative Tudor bri …
33Approximations of π — Timeline of approximations for pi …
34Montmartre funicular — Year opened 1900 Last extension Rolling stock 2 cabins Stations served 2 Terminal stations …
35drafting — /draf ting, drahf /, n. See mechanical drawing. [1875 80; DRAFT + ING1] * * * Precise graphical representation of a structure, machine, or its component parts that communicates the intent of a technical design to the fabricator (or the… …
36Antwerp — /an tweuhrp/, n. 1. a seaport in N Belgium, on the Scheldt. 209,200. 2. a province in N Belgium. 1,559,269; 1104 sq. mi. (2860 sq. km). French, Anvers. Flemish, Antwerpen /ahnt ver peuhn/. * * * French Anvers Flemish Antwerpen City (pop., 2000… …
37Parallel postulate — In geometry, the parallel postulate, also called Euclid s fifth postulate since it is the fifth postulate in Euclid s Elements , is a distinctive axiom in what is now called Euclidean geometry. It states that: If a line segment intersects two… …
38Area of a disk — Part of a series of articles on the mathematical constant π …
39Indian mathematics — mdash;which here is the mathematics that emerged in South Asia from ancient times until the end of the 18th century mdash;had its beginnings in the Bronze Age Indus Valley civilization (2600 1900 BCE) and the Iron Age Vedic culture (1500 500 BCE) …
40A good leg — Leg Leg (l[e^]g), n. [Icel. leggr; akin to Dan. l[ae]g calf of the leg, Sw. l[ a]gg.] 1. A limb or member of an animal used for supporting the body, and in running, climbing, and swimming; esp., that part of the limb between the knee and foot.… …
