Rectangular is an adjective, not a noun so there is no such thing as a rectangular. You an have a rectangular lamina, a rectangular pyramid, a rectangular prism, a rectangular antiprism and they all have different solid shapes.
rectangular
They are in a rectangular shape because it holds more room than any other shape.
There are many such solids: A heptagonal pyramid A cuboid (or rectangular prism) A hexagonal dipyramid A pentagonal pyramid with a 2-vertex shape on the other side etc.
a rectangular prisim
Solids have a fixed volume or shape at room temperature or pressure.
Many solids have no rectangular faces, including such forms as the hexagonal pyramid and the regular octahedron.
a shape that is rectangular so deal with it
Yes, solids have a definite shape
rectangular
No. Solids are resistant to changes in both shape and volume.
the shape of the base of a rectangular pyramid is a rectangle.
plants cell have a rectangular shape
Rectangular
Solids change their shapes in many ways. Solids will melt if they are in hot temperatures, and this changes their shape.
They are in a rectangular shape because it holds more room than any other shape.
There are many such solids: A heptagonal pyramid A cuboid (or rectangular prism) A hexagonal dipyramid A pentagonal pyramid with a 2-vertex shape on the other side etc.
Cube, rectangular prism