Cossos Geometrics
Transcript of Cossos Geometrics
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Els prismes són poliedres que tenen per base dos polígons iguals i per cares laterals , paral·lelograms.
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Exemples :
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1.1 El cub
At=Al+2Ab
Al=Pb·h
Ab=c²
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1.2 Prisma de base triangular:
At=Al+2Ab
Al=Pb·h
Ab=b·h:2
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1.3 Prisma de base quadrangular:
At=Al+2Ab
Al=Pb·h
Ab=b·h
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1.4 Prisma de base pentagonal:
At=Al+2Ab
Al=Pb·h
Ab=P·a:2
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Les piràmides són poliedres que tenen per base un polígon qualsevol i les cares laterals són triangles que concorren en un vèrtex comú de la piràmide
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Exemples:
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2.1 Piràmide de base triangular:
At=Al+Ab
Al=Pb·h:2
Ab=b·h:2
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2.2 Piràmide de base quadrangular:
At=Al+Ab
Al=Pb·h:2
Ab=c²
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2.3 Piràmides de base hexagonal:
At=Al+Ab
Al=Pb·h:2
Ab=P·a:2
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El con és un cos geomètric engendrat pel gir d’un triangle rectangle al voltant d’un dels seus catets
At=Al+Ab
Al=π·r·g
Ab=π·r²
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El cilindre és un cos geomètric engendrat pel gir d’un rectangle al voltant d’un dels seus costats.
At=Al+2Ab
Al=2·π·r·h
Ab= π·r²
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L’esfera és un cos de revolució engendrat per un semicercle que gira sobre el seu diàmetre
A=4·π·r²
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- Isaac Sayol
- Adrià Juárez
- Eros García
L’informació del treball i les fotografies han estat obtingudes de:
- Google (imàtges)
- Vikipèdia
- Fotografiades personalment.