a square that is a solid 3D figure
a triangle, a 3 sided figure, a figure with 3 points, etc.
Add the numbers together and divide by the amount of numbers there are
The length around a flat figure or the sum of its sides.
a geometric figure having a specified kind or number of faces.
in maths figure means "one of the elements that collectively form a system of numeration" for eg "0 & 1 are figures"
it is a flat side of a 3-d figure(solid figure)
There is no such concept in maths. A plane figure is a mathematical concept but that is not what the question is about.
Maths is everything. Maths can even be used by forensic scientists to create a figure of a whole body from a footprint. Anything that you can think of relates to maths in some form or another.
its mean the opposite
A shape in 2-dimensional space - a flat shape.