They're not always. But anytime something is not a pyramid shape, it's not called a pyramid,it's called something else. So everything that's left ... all the things that are a pyramid shape ...is called a pyramid.
When something reforms into a new shape, this process is called "restructuring" or "reforming." It involves changing the structure or form of an object to create a different shape or configuration.
I reckon, if a 70 sided shape is called a heptacontagon, and a 50 sided shape is called a pentacontagon, then a 40 sided shape might be called a quadracontagon, or something along those lines.
symmetrical shapes
When something changes like that it is called transformation.
A nine sided two dimensional shape would be called a nonagon. Nona is a common prefix meaning nine of something.
That shape is called a cylinder.That shape is called a cylinder.That shape is called a cylinder.That shape is called a cylinder.
Because if they were not circular they would be called something else, wouldn't they? Possibly elliptic, or "a flattened squarish shape" or "a wiggly shape".
A line which divides a shape in two is called a bisector.
That shape is called an 'oval' or an 'ellipse'.
It is said to be 'similar'
a shape is called a shape in mathematics