Each of the colored quilt patches used to make the star pattern is in the shape of a rhombus.
Star Quilt by Carrie Severt. Photo by Lyntha Scott Eiler, Blue Ridge Folklife Project, American Folklife Center, Library of Congress.
In the floor tile pattern, each red tile is in the shape of a rhombus. The four sides of a rhombus are congruent.
Photo copyrighted by Umbrian.com