In geometry, a pentadecagon is any 15-sided, 15-angled, polygon. A regular pentadecagon has interior angles of 156°, and with a side length a, has an area given by Geometry (Greek γεωμετρία; geo = earth, metria = measure) arose as the field of knowledge dealing with spatial relationships. ... Look up Polygon in Wiktionary, the free dictionary For other use please see Polygon (disambiguation) A polygon (literally many angle, see Wiktionary for the etymology) is a closed planar path composed of a finite number of sequential line segments. ...

'==Pentadecagon construction== A regular pentadecagon is constructible with straightedge and compass. The following animation illustrates this process in 36 steps, and is adapted from a method given in Euclid's Elements, Book IV, Proposition 16. Note that the compass radius remains unaltered during steps 14 through 21. In mathematics, there are several notions of constructibility: a point in the Euclidean plane that can be constructed with unruled straightedge and compass. ... A number of ancient problems in geometry involve the construction of lengths or angles using only an idealized ruler and compass, or more properly a straightedge and compass. ... Euclid Euclid of Alexandria (Greek: ) (ca. ... Euclids Elements (Greek: ) is a mathematical and geometric treatise, consisting of 13 books, written by the Greek mathematician Euclid around 300 BC. It comprises a collection of definitions, postulates (axioms), propositions (theorems) and proofs thereof. ...

Image File history File links PentadecagonConstructionAni. ...

superman Look up Polygon in Wiktionary, the free dictionary For other use please see Polygon (disambiguation) A polygon (literally many angle, see Wiktionary for the etymology) is a closed planar path composed of a finite number of sequential line segments. ... A triangle is one of the basic shapes of geometry: a two-dimensional figure with three vertices and three sides which are straight line segments. ... In geometry, a quadrilateral is a polygon with four sides and four vertices. ... In geometry, a pentagon is any five-sided polygon. ... A regular hexagon A hexagon is a polygon with six edges and six vertices. ... A heptagon is a plane figure with seven sides and seven angles. ... One of the 8 semi-regular tessellations: octagons and squares An octagon is a polygon that has eight sides. ... In geometry, an enneagon or nonagon is a nine-sided polygon. ... An image of a Regular Decagon In geometry, a decagon is any polygon with ten sides and ten angles, and usually refers to a regular decagon, having all sides of equal length and all angles equal to 144°. Its Schläfli symbol is {10}. The area of a regular decagon... Categories: Math stubs | Polygons ... A regular dodecagon A dodecagon is a polygon with exactly twelve sides. ... A triskaidecagon is a polygon with 13 sides and angles. ... Erchingers heptadecagon In geometry, a heptadecagon (or 17-gon) is a seventeen-sided polygon. ... Categories: Math stubs | Polygons ... In geometry, an icosagon is a twenty-sided polygon. ... A tricontagon is a polygon with 30 sides. ... A pentacontagon is a polygon with 50 sides. ... A hectagon is a polygon with 100 edges. ... A chiliagon is a polygon with 1000 sides. ... A myriagon is a polygon with 10,000 sides. ...

patrick capito in house of lola violy