A solid has a defined shape and volume
A liquid has a define shape but a gas has no define shape
liquid has a definite volume and takes on the shape of its container.
The shape is a four-sides shape, it is a polygon
Irregular or without a definite shape.
Solids have a define shape since the particles are cooled down. This brings the molecules close together which forms a fixed shape.
The two foci are necessary to define the location of an ellipse, but the shape depends on the eccentricity, which is related to the lengths of the two axes.
Compound words using 'one' are onesided (argument), onedimensional (flat), onetime (as a modifier).
a shape that has a length and height, but no width.