Unless there is more specific infomation, the only possible answer is a figure.
a washer
sphere
A decagon.
Any shape is mathematical.
A six-sided shape is called a hexagon.
a washer
sphere
convex
Type your answer here... what is the answer
Pentagon
A decagon.
toroid
Any shape is mathematical.
octagon
a cube or cuboid
A six-sided shape is called a hexagon.
A mathematical name would be 213-gon.