An Octagon
An octagon.
An 8-sided plane figure is an octagon.
A pyramid with a base that has seven sides.
An octagon.
Octagon.
An 8 sided octagon would fit the given description.
An octagon has 8 sides. There is a general formula for all plane geometric figures. The sum of the interior angles is 180(n-2) where n is the number of sides. So: 180(8-2) = 180x6 = 1080
An 8 and a 3
An Octagon.
An octagon
An octogon.
A shape with 8 sides is an octagon.