decagon

As nouns the difference between decahedron and decagon

is that decahedron is a polyhedron with ten faces while decagon is decagon.

As nouns the difference between octagon and decagon

is that octagon is octagon while decagon is decagon.

As nouns the difference between decagon and cone

is that decagon is (geometry) a polygon with ten sides and ten angles while cone is (label) a surface of revolution formed by rotating a segment of a line around another line that intersects the first line.

As a verb cone is

(label) to fashion into the shape of a .

In context|geometry|lang=en terms the difference between polygon and decagon

is that polygon is (geometry) such a figure and its interior, taken as a whole while decagon is (geometry) a polygon with ten sides and ten angles.

As nouns the difference between polygon and decagon

is that polygon is (geometry) a plane figure bounded by straight edges while decagon is (geometry) a polygon with ten sides and ten angles.

Decagonal is a related term of decagon.

As a adjective decagonal

is shaped like a decagon.

As a noun decagon is

(geometry) a polygon with ten sides and ten angles.