The eye-pentagon construction

dc.contributor	Universidade Estadual Paulista (UNESP)
dc.creator	Pegg Jr, Ed
dc.date	2016-10-26T17:47:40Z
dc.date	2016-10-26T17:47:40Z
dc.date.accessioned	2017-04-06T11:36:31Z
dc.date.available	2017-04-06T11:36:31Z
dc.identifier	http://acervodigital.unesp.br/handle/unesp/360656
dc.identifier	http://objetoseducacionais2.mec.gov.br/handle/mec/5268
dc.identifier.uri	http://repositorioslatinoamericanos.uchile.cl/handle/2250/956938
dc.description	none
dc.description	With a ruler and compass, an eye is easy to construct, leading to a regular pentagon construction. First draw a unit circle centered at O, the pupil. With centers at the top and bottom of the pupil, draw two circles of radius 2 to form the eyelids. Using the top of the pupil (A) as the center, draw an arc of radius 1 (AO) to intersect the upper eyelid at B. With C as the left corner of the eye, draw an arc with radius OC, and then a larger arc with radius BC. Draw a final arc with radius BC centered at O. Connect the intersection points for the pentagon
dc.description	Componente Curricular::Ensino Fundamental::Séries Finais::Matemática
dc.relation	32TheEyePentagonConstruction.nbp
dc.rights	Demonstration freeware using Mathematica Player
dc.subject	Euclid's Elements
dc.subject	Golden Ratio
dc.subject	Greek Mathematics
dc.subject	Educação Básica::Ensino Fundamental Final::Matemática::Espaço e forma
dc.title	The eye-pentagon construction
dc.type	Otro