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  2. Compass (drawing tool) - Wikipedia

    en.wikipedia.org/wiki/Compass_(drawing_tool)

    A compass, also commonly known as a pair of compasses, is a technical drawing instrument that can be used for inscribing circles or arcs. As dividers, it can also be used as a tool to mark out distances, in particular, on maps. Compasses can be used for mathematics, drafting, navigation and other purposes.

  3. Straightedge and compass construction - Wikipedia

    en.wikipedia.org/wiki/Straightedge_and_compass...

    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).

  4. Heptadecagon - Wikipedia

    en.wikipedia.org/wiki/Heptadecagon

    Publication by C. F. Gauss in Intelligenzblatt der allgemeinen Literatur-Zeitung. As 17 is a Fermat prime, the regular heptadecagon is a constructible polygon (that is, one that can be constructed using a compass and unmarked straightedge): this was shown by Carl Friedrich Gauss in 1796 at the age of 19. [1]

  5. Compass - Wikipedia

    en.wikipedia.org/wiki/Compass

    A modern military compass, with included sight device for aligning. A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north.

  6. Mathematical instrument - Wikipedia

    en.wikipedia.org/wiki/Mathematical_instrument

    Animation of construction of a pentagon using a compass and straightedge. A mathematical instrument is a tool or device used in the study or practice of mathematics.In geometry, construction of various proofs was done using only a compass and straightedge; arguments in these proofs relied only on idealized properties of these instruments and literal construction was regarded as only an ...

  7. Cardinal direction - Wikipedia

    en.wikipedia.org/wiki/Cardinal_direction

    Direction determination refers to the ways in which a cardinal direction or compass point can be determined in navigation and wayfinding.The most direct method is using a compass (magnetic compass or gyrocompass), but indirect methods exist, based on the Sun path (unaided or by using a watch or sundial), the stars, and satellite navigation.

  8. Math Images Project - Wikipedia

    en.wikipedia.org/wiki/Math_Images_Project

    The Math Images Project is a wiki collaboration between Swarthmore College, the Math Forum at Drexel University, and the National Science Digital Library. The project aims to introduce the public to mathematics through beautiful and intriguing images found throughout the fields of math. The Math Images Project runs on MediaWiki software, as ...

  9. Portal:Mathematics/Featured picture archive - Wikipedia

    en.wikipedia.org/wiki/Portal:Mathematics/...

    The thirteen books cover Euclidean geometry and the ancient Greek version of elementary number theory. The Elements is one of the oldest extant Greek mathematical treatises, the oldest extant axiomatic deductive treatment of mathematics, and has proven instrumental in the development of logic and modern science. It is also the most successful ...