A twelve-sided polygon is called a dodecagon.
A Pentagon
Enneadecagon
It's called a triangle.
Hexagon
Hexagon
DECAGON
Quindecagon or pentadecagona 15 sided pollygon is called a Pentadecagon, it has interior angles of 156 degrees each
A four sided polygon is a quadrilateral.
a twelve sided shape is called a dodecagon.
A twelve sided polygon is called a dodecagon.
A twelve sided shape is a dodecagon.
A polygon with five sides is a pentagon.