A scalene triangle.
Eight sided shape is called octagon.
Chiliagon = 1,000 Sided Shape
An eleven sided shape is called a hendecagon.
Five sided shapes are called Pentagons
A heptagon or a septagon. Equal-sided shapes are called "regular" so a seven equal sides shape is a regular heptagon.square square
this shape is called a trapizoid see heres a picture!
A non-descript four sided figure is a quadrilateral.
i guess an irregular hexagon
A square is a four-sided shape with all sides equal and all angles equal.
an equal sided triangle
An eight-sided plane figure is an octagon. If the sides are all the same length, and the angles are all equal, it is a regular octagon.
A regular 8 sided octagon has eight equal sides.