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A beam compass and a regular compass Using a compass A compass with an extension accessory for larger circles A bow compass capable of drawing the smallest possible circles. A compass, also commonly known as a pair of compasses, is a technical drawing instrument that can be used for inscribing circles or arcs.
A beam compass is a compass with a beam and sliding sockets or cursors for drawing and dividing circles larger than those made by a regular pair of compasses. [1] The instrument can be as a whole, or made on the spot with individual sockets (called trammel points) and any suitable beam.
Given points A, B, and C, construct a circle centered at A with the radius BC, using only a collapsing compass and no straightedge. Draw a circle centered at A and passing through B and vice versa (the blue circles). They will intersect at points D and D'. Draw circles through C with centers at D and D' (the red circles).
The compass can have an arbitrarily large radius with no markings on it (unlike certain real-world compasses). Circles and circular arcs can be drawn starting from two given points: the centre and a point on the circle. The compass may or may not collapse (i.e. fold after being taken off the page, erasing its 'stored' radius).
The compass is used to draw arcs and circles. A drawing board was used to hold the drawing media in place; later boards included drafting machines that sped the layout of straight lines and angles. Tools such as templates and lettering guides assisted in the drawing of repetitive elements such as circles, ellipses, schematic symbols and text.
Geometric drawing made with ruler and compass. Geometric drawing consists of a set of processes for constructing geometric shapes and solving problems with the use of a ruler without graduation and the compass (drawing tool). [1] [2] Modernly, such studies can be done with the aid of software, which simulates the strokes performed by these ...
A spherical compass and center locator for drawing small circles; A set of wet-wipe markers for writing and drawing on the sphere and transparencies; A hanger for displaying spherical constructions and designs; A 16-page booklet of suggested activities, "Getting Started on the Lenart Sphere" A four-color polyconic projection of the earth that ...
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