a triangle, a 3 sided figure, a figure with 3 points, etc.
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"
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.
A shape in 2-dimensional space - a flat shape.
A nongon does not mean anything - in maths or otherwise. A nonagon, on the other hand, is a plane (2-dimensional) figure bounded by nine straight sides. It has 9 vertices.
A expression in maths is a collection of terms without an equality sign.
"tenth"
What symbol
division