a cube
no
a triangular pyramid.
No. Congruent means the same shape and the same size. Two perfect circles would be the same shape but they might not be the same size.
This shape is called an icosikaitera. All of the sides of the icosikaitera are all of the same equal length.
A solid has a definite shape and volume and the particles in a solid stay in the same position relative to each other. A liquid has a definite volume, but not a definite shape, and the particles in a liquid slide past and over each other. A gas has neither a definite shape nor volume but fills the entire container it is in. The particles in a gas move all around and bounce off each other and the walls of the container.
Yes. All koalas are essentially the same shape.
the particles in solids are closer together than in liquids and gases allowing it to keep its shape
No. Cells do not have the same size nor the same shape.
no
No, they are not.
no
Are all orbits the same shape????
If you drop small particles like sand they roll and form a natural angle. (Just steep enough to be held by friction.) Further particles keep rolling and the angle stays the same. This makes the natural shape.
They are all made of matter; just in different states.
the shape is a regular shape if it has all the same angles and side lengths.
Well, since a gas spreads to encompass its container, it should have the same volume as its container.