







An irregular quadrilateral 
20091029 

From riya: what is irregular quadrilateral? Answered by Penny Nom. 





A regular quadrilateral 
20070313 

From Jackie: How can the measure of each angle of a regular quadrilateral be determined? Answered by Haley Ess. 





An irregular quadrilateral 
20060204 

From Christopher: Is there such a shape as an irregular quadrilateral with 4 equal sides? Answered by Penny Nom. 

