Answer: tetragon

AnswerCrossword Clue
TETRAGONRectangle or square
TETRAGONQuadrangle.
TETRAGONRhombus.
TETRAGONGeometric figure.
TETRAGONQuadrangle
tetragona four-sided polygon
tetragonpolygon having four angles or sides; quadrangle or quadrilateral