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The operator sets the wheel, turns the counter to zero, and then traces the pointer around the perimeter of the shape. When the tracing is complete, the scales at the measuring wheel show the shape's area. When the planimeter's measuring wheel moves perpendicular to its axis, it rolls, and this movement is recorded.
This was an official unit of measurement in South Africa until the 1970s, and was defined in November 2007 by the South African Law Society as having a conversion factor of 1 morgen = 0.856 532 hectares. [28] This unit of measure was also used in the Dutch colonial province of New Netherland (later New York and parts of New England). [29] [30]
It can also be used for measuring lengths and for calculating angles. [12] [13] L-square L-square is a generic term used for L-shaped squares, including framing squares, engineer's squares, and try squares. The shorter edge usually being the stock, and the longer edge the blade. Melencolia try square
Tools such as pens and pencils mark the drawing medium. Other tools such as straight edges, assist the operator in drawing straight lines, or assist the operator in drawing complicated shapes repeatedly. Various scales and the protractor are used to measure the lengths of lines and angles, allowing accurate scale drawing to be carried out.
Lux meter for measuring illuminance, i.e. incident luminous flux per unit area; Luminance meter for measuring luminance, i.e. luminous flux per unit area and unit solid angle; Light meter, an instrument used to set photographic exposures. It can be either a lux meter (incident-light meter) or a luminance meter (reflected-light meter), and is ...
a measuring device used either for determining the height of something, or for repetitious marking of items to be worked on. The former type of height gauge is often used in doctor's surgeries to find the height of people. Wire gauge: measuring tool determines the thickness of a wire.
Most are DGEs: software that allows the user to manipulate ("drag") the geometric object into different shapes or positions. The main example of a supposer is the Geometric Supposer, which does not have draggable objects, but allows students to study pre-defined shapes. Nearly all of the following programs are DGEs.
Its closest cousin among common, modern tools, is the combination square, which shares with the Odd Job the functions of scribing, squaring, level/plumb, and the sliding and locking ruler [2] (originally a 12 inch wooden ruler with a built-in trammel point was included with units bundled with a ruler, [3] but this was often changed and many are ...