| Using parallelograms to define affine transformations may be a mixed blessing. |
| For example, Angel consists of three layers of open triangles, trapezoids, parallelograms and pentagons, once again made of wood. |
| This requires that their underlying lattices be based on triangles, parallelograms, or hexagons. |
| In particular books one and two set out basic properties of triangles, parallels, parallelograms, rectangles and squares. |
| It was parallel and modern and ran level with lines of mountain, it was squares to be bisected and parallelograms and rhomboids. |
| Analysts also use a variety of symbols, such as parallelograms, pentagons, and others, to depict different types of events and activities. |
