ennedagon
The name of a four sided figure (or shape) is called a Square. :)
It can be hard learning and memorizing all the name of the different polygons. A 25 sided shape is called icosikaipentagon.
An icosikaidigon is a 22-sided polygon. For names of polygons see http://mathforum.org/dr.math/faq/faq.polygon.names.html
a quadrilateral, or Tetragon, or Quadrangle
it doesnt have a name if it has the name is square
quadrilaterals
They are 4 sided quadrilaterals
All of them are both quadrilaterals and quadrangles. That's two names!
A four-sided polygon whose sides are all equal and whose angles are all equal has all of the following names: -- square -- rectangle -- rhombus -- parallelogram -- quadrilateral
Triacontagon
ennedagon
A polygon is a quadrilateral. So examples would be a rectangle, parallelogram, Rhombus, square, trapezoid, kite.
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There are too many 4-sided polygons which satisfy those requirements and there is no specific name for them.
It's quite acceptable to call them 20-29agons but what's more important is knowing how to work out their properties
icosikaidi is the name for a 22 sided polygon. For a list of the names for polygons, see the related link.