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Not sure of the formal proof, but consider:
Suppose you can have a polygon with 2 sides. Start with one 'vertex' and connect to the second 'vertex' with a straight line segment - that's one side. Now for the second side, connect a straight line segment from the second vertex back to the first vertex. This will be the same line segment that you just drew.
Try drawing a polygon with 1, or 0 sides, as well. You cannot do it. "Polygon" comes from Greek for "many corners".
What else can I help you with?
What typ of shapes are polygons?
Polygons are shapes that have 3 or more sides
What shapes are ploygons?
Polygons are shapes with 3 or more sides
What are 3 dimensional shapes called?
Polygons !
Are 3 dimensional shapes considered polygons?
No.
What are triangle out shapes?
They are 3 sided polygons
What is a polygon with 3 sides called?
there isn't a polygon with 3 sides but there are triangles. polygons start with hexgons; 5 sided shapes.
What are the flat shapes called?
They are polygons and they have 3 or more sides
What shapes have more than ten sides?
There is no special name: they are polygons, as are shapes with 3 or 3 million sides.
What shapes has 3 sides?
A:isoselesscaleneequilateralB:A perfect Cylinder has only a Top-side, a bottom-side and a surrounding side, therefore it counts to three.
What are all the shapes that are not polygons?
They are 3 dimensional objects such a s polyhedrons.
What is the relationship with octahedron and icosahedron?
They are both 3 dimensional shapes with faces that are polygons.
What are all 3 sided shapes identafied by?
They are in the class of polygons known as triangles
