Robert Becker Crossword Puzzle

Regular Polygons Triangles by Angles

Triangle rectangle, is one that has an angle of 90 °

acute triangle , is one in which its three angles are less than 90 º

obtuse triangle , is one that has an angle greater than 90 º

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Platonic Solids

polyhedra whose faces are all congruent regular pologonos are called "regular polyhedra" or "Platonic solids." There are only five:

• regular tetrahedron (4 vertices, 6 edges, 4 equilateral triangles as faces)
  



• regular hexahedron or cube (8 vertices, 12 edges, 6 squares as faces)
  



• regular octahedron (6 vertices, 12 edges, 8 equilateral triangles as faces)
  



• regular dodecahedron (20 vertices, 30 edges, 12 pentagons as faces)
  



• regular icosahedron (12 vertices, 30 edges, 20 equilateral triangles as faces)
  

This is known since the days of classical Greece, and its "rarity" explains the fascination that these bodies have exercised throughout history.

The ancient Greeks associated each of the regular polyhedra the elements composing the universe. Plato in his Timaeus, associated with each of the four elements that the Greeks were the universe, fire, air, water and land to a polyhedron: tetrahedron fire, air the octahedron, icosahedron and ground water at the hexahedron or cube. Finally
associated the last regular polyhedron, the dodecahedron, the Universe. For this reason, these polyhedra are called Platonic solids. You can see a representation of polyhedra by Kepler, which is represented this association.

prefixes Tetra, Hexa, Octa, and Icosa Dodeca that give name to the five regular polyhedra indicate the number of polygons (faces) that form the body

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primary and complementary colors

October 13, 2009

This exercise will work as a team throughout the group, used in regular each half sheet of cardboard drums, cardboard squares also use iris 3x3cm , primary colors and complementary colors, these squares in half the fold (diagonal), with modules they did three pieces combining colors: red green purple yellow orange blue.

first grid the cardboard sheets of the same battery as the color boxes and modules already armed, they were beating the drums for the form the shape of a mural, we did the figure of a diamond.

Self-criticism: I found very interesting activity, although I found it much too laborious, however I like, it was interesting to work in teams, but I think we miss a lot of organization planning more than anything about what we wanted to do , since if you do not plan anything, but if I liked the result, but we could have done better.