They form the quadrilateral wherein Daudet's fame is secure.
A quadrilateral figure that has only two of its four sides parallel.
Thus, in the circle and the quadrilateral (the parts are not circles or quadrilaterals).
The walled part of the town is a quadrilateral with faces of about 1200 yds.
The quadrilateral Isis-headed capital, as at Denderah, was often used.