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solids ![click to hear : solids click to hear : solids](../../../images/speaker-vert.gif)
Geometric shapes in three dimensions that are delimited by surfaces.
helix ![click to hear : helix click to hear : helix](../../../images/speaker-vert.gif)
Volume or solid of spiral shape that turns toward the left at a constant angle.
cylinder ![click to hear : cylinder click to hear : cylinder](../../../images/speaker-vert.gif)
Volume or solid generated by the rotation of a straight line (generatrix) moving along a curved line (directrix).
regular octahedron ![click to hear : regular octahedron click to hear : regular octahedron](../../../images/speaker-vert.gif)
Volume or solid with eight triangular sides of equal area; it has six vertices and 12 edges.
parallelepiped ![click to hear : parallelepiped click to hear : parallelepiped](../../../images/speaker-vert.gif)
Volume or solid with six sides (parallelograms) that are parallel in pairs.
cube ![click to hear : cube click to hear : cube](../../../images/speaker-vert.gif)
Volume or solid with six square sides of equal area and six equal edges; it has eight vertices.
pyramid ![click to hear : pyramid click to hear : pyramid](../../../images/speaker-vert.gif)
Volume or solid generated by straight lines (edges) connecting the angles of a polygon (base) to the vertex and whose sides form triangles.
cone ![click to hear : cone click to hear : cone](../../../images/speaker-vert.gif)
Volume or solid generated by the rotation of a straight line (generatrix) along a circular line (directrix) from a fixed point (vertex).
torus ![click to hear : torus click to hear : torus](../../../images/speaker-vert.gif)
Volume or solid generated by the rotation of a circle at an equal distance from its center of rotation.
sphere ![click to hear : sphere click to hear : sphere](../../../images/speaker-vert.gif)
Volume with all the points on its surface the same distance from its center; the solid thus delimited is a round ball.
hemisphere ![click to hear : hemisphere click to hear : hemisphere](../../../images/speaker-vert.gif)
Half sphere cut along its diameter.