you can describe it by its angles, or sides
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Stop Sign, box of cereal.
Placing a question mark at the end of a phrase does not make it a sensible question. Try to use a whole sentence to describe what it is that you want answered. The answer may be "polygon" but it is difficult to tell when the question is unclear.
Use the formula of: 0.5*(n2-3n) whereby n is the number of sides of the polygon
Polygon with four sides identical in length, four angles, all of which are 90 degrees.
What polygon? Your asking "what are two names to describe a polygon" but haven't given a polygon...
When I was taking a test in math, I had to describe a polygon.
A polygon is a shape with 3 or more sides
A concave polygon.
describe the character;information of polygons
concave
An hexagon is a 6 sided polygon
a rectangle
equal and sided
An octagon is an 8 sided polygon
A decagon is a 10 sided polygon
There is insufficient information for us to answer this question. Placing a question mark at the end of a phrase does not make it a sensible question. Please try to use a whole sentence to describe what it is that you want answered.