An octagon.
A shape with four unequal sides is called an irregular quadrilateral.
Triangle
It is a heptagon which is sometimes called a septagon but they both have 7 sides and 7 interior angles
A shape with 5 angles has 5 sides, always. Pentagons have 5 sides, and 5 angles.
A shape with 5 sides and 5 angles is a pentagon.
An octogon
A shape with eight sides is always an octagon. If all angles and sides are equal, it is called a regular octagon.
An octagon has 8 sides and 8 angles.
octagon
A shape with 11 sides and angles is called an 11-gon, or a hendecagon.
This Shape is a HEXAGON which has 6 sides and 6 angles.
octogon
A shape with parallel sides but no right angles is called a parallelogram
a eight sided shape is called a octagon.
The shape is called a decagon. If all the sides and angles are the same, it is called a regular decagon.
square
Any shape with three sides and three angles is called a triangle.