a triangle.
It is a quadrilateral.
A nonagon is a nine-sided polygon.
It looks like a square with a triangle on top of it.
there are any pictures on this sit to show you try Google image or bing
A polygon
it look like a fifty sided shape
Like this
see related link below to see the 20 sided polygon
It is a seven-sided polygon
polyhedron
The Pentagon.
a triangle.
It is a quadrilateral.
A polygon is a closed three or more sided figure. It can not have any curves or intersecting lines.
A polygon is a closed three or more sided figure. It can not have any curves or intersecting lines.
It looks like a circle