Crossword Clue:

A four sided figure

AnswerCrossword Clue
OBLONGFour-sided figure
RHOMBFour-sided figure
RECTANGLEFour-sided figure
RHOMBUSFour-sided figure
QUADFour-sided figure, for short
RHOMBOblique-angled, four-sided figure
TRAPEZOIDFour-sided figure with two parallel sides.