It is called a triangle.
A three-sided, two-dimensional polygon is called a "triangle".
it is called a triangle
It is called a triangle
A 3-sided figure is called a triangle.
triangle
A 19 sided polygon is called an enneakaidecagon.
An equilateral triangle.
A triangle with 3 different sided triangular measures is called a scalene triangle basically.
A triangle only has 3 sides, but a 10 sided shape is called a decagon
An obtuse angled triangle!
scalene