Both models were produced in the mid-1980s, and included body and neck binding, though with dot fingerboard inlays instead of more ornate trapezoids.
en.wikipedia.org The language defines the code required for geometric shapes such as polygons, rectangles and trapezoids.
en.wikipedia.org Each of these is divided into smaller categories; triangles can be equilateral, isosceles, obtuse, acute, scalene, etc. while quadrilaterals can be rectangles, rhombi, trapezoids, squares, etc.
en.wikipedia.org The result is a set of pixel-space trapezoids and additional shaded geometry to compute fractional coverage for the left and right edges of the trapezoids.
en.wikipedia.org The structure was a trapezoid, encompassing one infantry rampart, and was equipped with two armored watchtowers, electricity, and ventilation.
en.wikipedia.org