The minimum number of sides for a polygon is 3 sides.
it could be a square or a rectangle. its a square if all four sides are congruent, but if not, its a rectangle.
Angles that have the same measure are called congruent angles.
decagon
On etymological grounds I would be tempted to call a 1000 sided polygon a myriagon. I will also point out that for most purposes we would call it a circle, since with that many sides it very closely approaches circularity.
A polygon with four equal angles and sides is a square.
The minimum number of sides for a polygon is 3 sides.
Dodecagon 12 sides with 12 angles
A polygon with 12 sides and 12 angles = a Dodecagon
An equilateral triangle
quadrilateral quadrangle
An Isosceles Triangle.
That is an equilateral triangle.
Just call them "congruent angles".
Answer #1:A rhombus is a 4 sided polygon. However, for the figure to be a rhombus, it must have 4 congruent sides, but not 4 right angles.==========================Answer #2:Yes, it can, but it doesn't need to be.When it is, we call it a "square".
Triangles can't have two sides, but a triangle with three congruent sides is a equilateral or three congruent angles in a triangle is equilangular.
Its called a regular polygon