a quadrilateral.
http://wiki.answers.com/Q/What_is_a_shape_with_fou...

A 12sided shape or polygon is called a dodecagon. An interior angle of a dodecagon is equal to 150 degrees and the sum of all the interior angles is equal to 1800 degrees. You can
http://answers.ask.com/Science/Mathematics/what_is...

Any foursided shape is a Quadrilateral.
http://www.chacha.com/question/whatistheshapec...

a. polyhedron. (if the shape is 3 dimensional) a. polygon. if it is a planar shape.
http://wiki.answers.com/Q/What_is_a_65_sided_shape...
