A quadrilateral
A 12 sided figure is called a dodecagon.
It is called an 'Irregular Hexagon'
A two-dimensional eleven-sided figure is called a hendecagon.
A twenty sided, 2D figure is called an icosagon.
A plane figure bounded by some numbers of straight sides is called a polygon. Thus a polygon with ten-sided is called a decagon.
an four sided figure is called a quadrilateral.
quadrilateral
A 12 sided figure is called a dodecagon.
A shape with four uneven sides is called an irregular quadrilateral. Unlike regular quadrilaterals, which have sides of equal length or angles of equal measure, irregular quadrilaterals can have varying lengths and angles. Examples include trapezoids or any four-sided figure that doesn't meet the criteria for regular shapes.
A heptagon. Note that an irregular heptagon can have even sides - if the angles are not all the same.
A 5-sided figure is called a "Pentagon".
parallelogram
A 10 sided shape is a decagon
A ten sided figure is called a Decagon. ( i think that's how you spell it. )
It is called an 'Irregular Hexagon'
A plane figure with a googol sides is called a googolgon.
a 12 sided figure is called a dodecagon