Elements: point, line and plane.

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Figures, shapes and developments.

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Figures, shapes and developments. In the figure shows how to build a tangential spheres in space. The centers of the spheres are the vertices of a regular polyhedron and their radii corresponding to half of each edge of the polyhedron.As the regular polyhedron has all have equal sides all have the same diameter spheres and simultaneously are tangent at the midpoint of each edge. The figure shows a regular icosahedron in plan, elevation and profile. At each vertex of the icosahedron is drawn as a sphere radius by taking half of the edge so that all areas are equal and tangent to each other. If the polyhedron is Archimedean and therefore consists of regular polygons but also various regular (equal sides), the spheres have also the same size but remain tangent to one another, maintaining a greater distance between them being a major faces others like shown in this icosidodecahedron given in plan and elevation. To draw tangents exercises spheres whose centers are on the same ...
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Foundation

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The dihedral system is a method of representation of multiple projections, where the elements are defined by their orthogonal projections on at least two planes of projection.  projection planes that we use are generally 3:  plan, elevation and profile  .  Once they have been projected onto each of them the  orthogonal views  of the object are rotated until they match the three in the same plane. Figure cylinder projecting a point by point on the horizontal plane and the vertical PH PV. As is done by perpendicular, the circumference of the base becomes the elevation in a straight line, as the plane that contains perpendicular to the vertical. For be parallel to the floor, the upper face of the cylinder on this plane is transformed Like a circle. The line of intersection of vertical and horizontal plane is called  land line  .  Then turn the vertical plane 90 degrees until it coincides with the horizontal axis of rotation t...
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