Bisection along a line of symmetry.
A dodecagon or dudecagon are both acceptable terms
A shape with 7 sides is a heptagon
you call a two dimensional shape with six sides a hexagon
A shape with 8 sides is an octagon.
Triangle is a shape with three sides.
A shape with five sides would be a pentagon, but a shape can not have 5 right angles. Squares and Rectangles are both shapes with 4 sides and 4 right angles. They are the only shape with the same amount of right angles as there is sides.
A regular shape.
A situation where both sides are equally distanced from the midline is referred to as "symmetry." In this context, both halves mirror each other in terms of distance and arrangement. This concept is commonly applied in various fields, including art, mathematics, and biology, to describe balanced and proportionate structures.
a shape with nine sides is called nonagon
It is an irregular shape
A shape with straight sides is called a polygon. But it can have 3 or 4 sides as well.
A shape with 5 sides is a pentagon