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