A plane figure with eight sides is an octagon.
a square is a plain figure which has all the sides equal but a rhombus is a plain figure which has the opposite sides equal.
I guess it is a dice or what else is it supposed to be? A hexagon is a plane figure with 6 sides.
octagon
OctagonAn octagon is a 2-D figure with 8 sides.
Octahedron
Hendecagon
it may be a parallelogram or a kite both have opposite sides equal
A two-dimensional figure is a polygon. The eight sides means that it uses the prefix octa- (meaning eight) to form the name octagon.
The polygon (figure) that contains 8 sides is called an "octagon".
It is a geometric figure with eight equal sides.
rectangles squares