a shape with nine sides is called nonagon
A hexagon
dont no!
A quadrilateral.
The shape you're referring to is call a decagon.
A icosahedron.
A shape with 7 sides is a heptagon
A shape with three sides is a triangle.
you call a two dimensional shape with six sides a hexagon
Triangle is a shape with three sides.
A shape with 8 sides is an octagon.
A regular shape.
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
The icosahedron is the shape that has 20 sides. The icosahedron also has five triangular faces that join together at each vertex.