Classification,+ Comparison+and+Contrast+Version+2

Classification
The circumference can be classified for dimension:

first dimension: In the first dimension, the circumference is represented by a line. this line is the diameter of tha circumference.

second dimension: In the second dimension, the circumference is visible and show all it´s elements (radius, diameter, center, etc.).

Third dimension: In the third dimension, the circumference is a hollow sphere. addition of show their elements, also shows the volume.


 * Comparison and Contrast**

The circumference can be considered an ellipse of zero eccentricity or an ellipse with equal semiexes.

This can be also viewed as a polygon, but unlike the regular and irregular polygons, has infinite sides.

The circumference is different to circle because this hasn´t area, since the circumference is the perimeter or curved line that this around of circle that contains.

However, both have in common the radio and the perimeter of the circle, where the latter can be calculated by the formula 2.pi.r.