Obs. [mod.L. trapezia, adj. fem. f. TRAPEZIUM, used absol. for trapezia figura trapezial figure or shape.] A quadrilateral figure other than a parallelogram; the ‘trapezium’ of Euclid, comprising the later trapezium and trapezoid.
1631. De la Main (title), The making, description, and use of a small portable Instrument for the Pocket … in form of a mixt Trapezia thus called a Horizontall Quadrant.
1693. J. Wing, Heptarchia Math., 64. A Table shewing the Area of Right-line Figures, as Squares, Triangles, and Trapezia’s.
1752. A. Fletcher, Univ. Measurer, I. 98. To reduce a Trapezia ABCD to a triangle.
1766. Compl. Farmer, s.v. Surveying, Quadrangular figures … are either parallelograms or trapesias.
