Some popular fretboard inlays include rhombuses, parallelograms, isosceles trapezoids, shark fins and rectangles. Examples of equidiagonal quadrilaterals include the isosceles trapezoids, rectangles and squares. The cyclic equidiagonal quadrilaterals are exactly the isosceles trapezoids. The illusion can also be constructed using identical trapezoids rather than identical parallelograms. Geometric figures are rendered by client-side tessellation into either triangles or trapezoids. Quadrilaterals with reflection symmetry are kites, (concave) deltoids, rhombi, and isosceles trapezoids. The 12 diagonal square faces will become isosceles trapezoids. Its lateral faces can be trapezoids or triangles. The language defines the code required for geometric shapes such as rectangles, trapezoids, and polygons. Other problems show how to find the area of rectangles, triangles and trapezoids. The side-angle duality of kites and isosceles trapezoids are compared in the table below. It is possible for obtuse trapezoids or right trapezoids (rectangles). A better approach replaces the rectangles used in a Riemann sum with trapezoids. This is possible for acute trapezoids or right trapezoids (rectangles). Examples of tangential trapezoids are rhombi and squares.