Search results
Results from the WOW.Com Content Network
A variety of rulers A 2 m (6 ft 6 + 3 ⁄ 4 in) carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]
A fleeting hint of an ancient decimal or metric system may be found in the Mohenjo-Daro ruler, which uses a base length of 1.32 inches (33.5 mm) and is very precisely divided with decimal markings. Bricks from that period are consistent with this unit, but this usage appears not to have survived, as later systems in India are non-metric ...
Slide rule. Typical ten-inch (25 cm) student slide rule (Pickett N902-T simplex trig) A slide rule is a hand -operated mechanical calculator consisting of slidable rulers for evaluating mathematical operations such as multiplication, division, exponents, roots, logarithms, and trigonometry.
Geometry. In geometry, straightedge-and-compass construction – also known as ruler-and-compass construction, Euclidean construction, or classical construction – is the construction of lengths, angles, and other geometric figures using only an idealized ruler and a pair of compasses. The idealized ruler, known as a straightedge, is assumed ...
Scale ruler. A scale ruler is a tool for measuring lengths and transferring measurements at a fixed ratio of length; two common examples are an architect's scale and engineer's scale. In scientific and engineering terminology, a device to measure linear distance and create proportional linear measurements is called a scale.
Demigod and hero rulers from hero myths—the largest group Chinese myths—are attributed the invention of specific items, practices or traditions. [26] Among the more important of them are Fuxi, the inventor of hunting; Suiren, who invented fire; and Shennong, who invented both agriculture and medicine. [27]
The next ruler, Deva Raya I, emerged successful against the Gajapatis of Odisha and undertook important works of fortification and irrigation. [248] Italian traveller Niccolo de Conti wrote of him as the most powerful ruler of India. [249] Deva Raya II succeeded to the throne in 1424 and was possibly the most capable of the Sangama Dynasty ...
The Assyrian King List includes a long sequence of rulers before Assyria's first confidently attested kings (of the Puzur-Ashur dynasty), though it is suspected by modern scholars that at least portions of this line of rulers are invented since none of the names are attested in contemporary records and many of the names of the earliest rulers ...