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Cossos Geometrics

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Cossos Geometrics

  1. 1. Cossos geomètrics en l'espai (3D)
  2. 2. 1. Els prismes: Els prismes són poliedres que tenen per base dos polígons iguals i per cares laterals , paral·lelograms.
  3. 3. Exemples :
  4. 4. 1.1 El cub At =Al+2Ab Al =Pb·h Ab =c ²
  5. 7. 1.2 Prisma de base triangular: At =Al+2Ab Al =Pb·h Ab =b·h:2
  6. 10. 1.3 Prisma de base quadrangular: At =Al+2Ab Al =Pb·h Ab =b·h
  7. 13. 1.4 Prisma de base pentagonal: At =Al+2Ab Al =Pb·h Ab =P·a:2
  8. 15. 2. Les piràmides: 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
  9. 16. Exemples:
  10. 17. 2.1 Piràmide de base triangular: At =Al+Ab Al =Pb·h:2 Ab =b·h:2
  11. 20. 2.2 Piràmide de base quadrangular: At =Al+Ab Al =Pb·h:2 Ab =c ²
  12. 23. 2.3 Piràmides de base hexagonal: At =Al+Ab Al =Pb·h:2 Ab =P·a:2
  13. 25. 3. Cossos de revolució:
  14. 26. 3.1 Cossos de revolució: El con 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 ·r ²
  15. 28. 3.2 Cossos de revolució: El cilindre 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 ·r ²
  16. 30. 3.3 Cossos de revolució: L'esfera L’ esfera és un cos de revolució engendrat per un semicercle que gira sobre el seu diàmetre A =4· π ·r ²
  17. 33. Treball realitzat per: - Isaac Sayol - Adrià Juárez - Eros García Bibliografia: L’informació del treball i les fotografies han estat obtingudes de: <ul><li>Google (imàtges) </li></ul><ul><li>Vikipèdia </li></ul><ul><li>Fotografiades personalment. </li></ul>

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