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Please use this identifier to cite or link to this item: `http://acervodigital.unesp.br/handle/unesp/360656`
Title:
The eye-pentagon construction
Author(s):
Language:
eng
Description:
• none
• 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
• Componente Curricular::Ensino Fundamental::Séries Finais::Matemática
Issue Date:
• 11-Sep-2008
• 2008
• 11-Sep-2008
• 11-Sep-2008
• 9-Sep-2008
Keywords:
• Euclid's Elements
• Golden Ratio
• Greek Mathematics
• Educação Básica::Ensino Fundamental Final::Matemática::Espaço e forma
Notes:
Show the eye-pentagon construction
Credits:
This demonstration needs the "MathematicaPlayer.exe" to run. Found in http://objetoseducacionais2.mec.gov.br/handle/mec/4737
Source:
http://objetoseducacionais2.mec.gov.br/handle/mec/5268
URI:
http://acervodigital.unesp.br/handle/unesp/360656
Rights:
Demonstration freeware using Mathematica Player
Type:
outro
Appears in Collections:MEC - Objetos Educacionais (BIOE) - OE

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