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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 ...
A collage of various national flags around the world (clockwise from top-left): The flag of Brazil being digitally drawn on a computer. The flag of Papua New Guinea on the patch of a soldier. A sports fan waving the flag of South Africa. Giant flag of Turkey made of Lego bricks. Flag of the United States on the moon during the Apollo 15 moon landing. Flags of the United Kingdom and India are ...
A scale ruler is a scaled, three-edged ruler which has six different scales marked to its sides. A typical combination for building details is 1:20, 1:50, 1:100, 1:25, 1:75 and 1:125. There are separate rulers for zoning work as well as for inch units. Today scale rulers are made of plastic, formerly they were made of hardwood. A pocket-sized ...
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.
There are two regular heptagrams, labeled as {7/2} and {7/3}, with the second number representing the vertex interval step from a regular heptagon, {7/1}. This is the smallest star polygon that can be drawn in two forms, as irreducible fractions. The two heptagrams are sometimes called the heptagram (for {7/2}) and the great heptagram (for {7/3}).
For US legal paper size (8 + 1 ⁄ 2 by 14 inches, 220 by 360 mm), a 4-hole system exists. It is still in use today, but is not as common as the 3-hole standard. The four holes are positioned symmetrically with centers 3 + 1 ⁄ 2 inches (89 mm) apart. The four binding positions provide more support for the longer 14-inch side of legal paper.
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, is an instrument used to make length measurements, whereby a user estimates a length by reading from a series of markings called "rules" along an edge of the ...
The most complete text of the Instruction of Amenemope is British Museum Papyrus 10474, acquired in Thebes by E. A. Wallis Budge in early 1888. [1] [9] The scroll is approximately 12 feet (3.7 m) long by 10 inches (250 mm) wide; the obverse side contains the hieratic text of the Instruction, while the reverse side is filled with a miscellany of lesser texts, including a "Calendar of Lucky and ...