A solar water heater is typically shaped like a rectangular prism or a cylinder. The rectangular prism shape is common for flat-plate solar collectors, while the cylinder shape is often used for evacuated tube solar collectors. Both shapes maximize the surface area exposed to sunlight to efficiently heat water using solar energy.
A net for a geometric solid is the 2-D pattern for constructing the 3-D shape.
a sphere
A Cone.
A Square Pyramid.
A prism is a solid geometric object. If you know its shape and dimensions you can calculate its volume.
A net for a geometric solid is the 2-D pattern for constructing the 3-D shape.
That is a rectangular solid.
crystal
A crystal.
Describing a geometric solid with only two dimensions may not provide a complete representation of its shape and structure. A geometric solid is best described in three dimensions to convey its full volume, surface area, and shape.
Hexagon
cyclinder?
A solid object has a definite volume and geometric form. Solids have tightly packed particles that do not conform to the shape of its container.
a sphere
I think you are referring to a crystal.
The pyramid is made in the geometrical solid shape of quadrilateral pyramid.However there are some geometrical polyhedra/ platonifc solid shapes of tetrahedron
geometric solid