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Maria Clara Ventura, 11º.D

Start

GeometriaDescritiva

· Contact

· Team

· Data

· Map

· Timeline

· Comparison

· Process

· Exercícios

Exercício

Arte com sombras

Rebatimento plnao oblíquo

Sobre mim

Índice

Eu sou a Maria Clara, sou aluna do 11º. D, na Escola Pedro Nunes, em Lisboa.

Sobre mim

01

Depois de descobrir o prisma, traçamos, passando por um ponto qualquer, o feixe luminoso e projeções paralelas às arestas do prisma. Deste modo descobrimos a reta de interseção que nos vai indicar que arestas estão iluminadas.Só é necessário fazer a sombra projetada dos pontos que fazem a separação entre o que está em luz e em sombra.

Exercícios de sombra do prisma

Depois de ter as projeções do cone desenhadas, traço o feixe luminoso passando pelo vértice. Onde essa reta intersetar o plano da base do cone, teremos o ponto I. Da distância entre o I e o V marcamos o ponto médio e descobrimos a sombra própria. Para descobrir a sombra projetada descobrimos o Vs. Nota: Se o cone tiver base horizotal (por exemplo), então a somra projetada no PHP vai ser também circular. Por isso é que na figura ao lado não se vê toda a sobra projetada.

Exercícios de sombra do cone

Inventados

Exercício de sombra de um sólido. (experiência)1º.Período

Depois de determinar a base do sólido (rebater num plano oblíquo)Achar ponto O no centro da base para determinar o eixo da pirâmideUtilizar um dos vértices para determinar a aresta do prismaTraçar uma linha perpendicular ao plano da base (p) a partir de O (vértice da base (A)) Determinar plano auxiliar (tôpo ou vertical) que contenha a reta p Rebater a reta p e o ponto O (A)Marcar a verdadeira grandeza OV (AA’)Desrebater a altura (V) (A’)Unir os vértices da base da pirâmide ao VTraçar paralelas por cada um dos vértices e fazer a nova base.

Altura dum sólido de base oblíqua

Arte com sombras

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Diet Wiegman

Rashad Alakbarov

Arte com sombras

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Exercício de sombra de um retângulo num plano de topo.

Sólido III Base plano de rampa

Sólido III Base plano de rampa

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Mar 20XX - Apr 20XX

Feb 20XX - Mar 20XX

Jan 20XX - Feb 20XX

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Timeline

Apr 20XX - May 20XX

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Jul 20XX - Aug 20XX

Jun 20XX - Jul 20XX

May 20XX - Jun 20XX

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Sep 20XX - Oct 20XX

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75%

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Map

75%

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1,250

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Name Surname

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THANKS!

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Exercícios de sombras

É apenas uma experiência de sombra de sólido. Neste exercício podemos ver a sombra própria. A sombra própria é o que já está em sobra no próprio sólido (ou figura).Nas figuras, existe sombra própria quando a projeção tem os pontos na ordem contrária ao dos pontos em sombra.

Exercícios de sombras

Podemos utilizar o método das retas ou utilizar o método do triângulo do rebatimento (também se utiliza para os planos passantes). Método do triângulo do rebatimento Distância do eixo do x à cota é perpendicular às linhas de chamada. A hipotenusa do triângulo formado entre o afastamento e a linha perpendicular é a medida do rebatimento.

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Link

https://www.facebook.com/p/Rashad-Alakbarov-100063740461495/

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Exercícios de sombras

Fazer uma reta auxiliar para cada vértice da figura, com abertura para a esquerda de 45º. Só fazemos As sombras virtuais se a sombra não se encontrarem todas as sombras ou no PPH ou no PPF.A dificuldade destes exercícios é desenhar as linhas paralelas umas às outras (com 1 mm de distância) e perpendicular à luz.

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Links

https://www.thisiscolossal.com/2013/03/light-sculptures-by-diet-wiegman/http://www.hollandartexhibition.com/artists/diet-wiegman-light-sculptures/http://www.hollandartexhibition.com/artists/diet-wiegman-light-sculptures/

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