If the angle from the base to the highest point is a right angle, it is right.
If not, it is oblique.
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Solids have a fixed volume or shape at room temperature or pressure.
Solids change their shapes in many ways. Solids will melt if they are in hot temperatures, and this changes their shape.
Some semi-solids might, but a solid, by definition keeps it's original shape.
Those would be called similar solids.
A ball and a globe are two objects that are sphere shaped.