| The octagon is formed by a kind of train-track motif that jogs around a flower-blossom design. |
| Each vertex triangle of the octagon is a vertex triangle of one such parallelogram. |
| Even more astonishing is his chapel, designed by Einhard on the basis of the mystic octagon. |
| If you think of an octagon as a square with its corners cut off, you'll realize how simple the shape truly is. |
| A flowerbed in the shape of a circle, square, or octagon looks formal, while one with a free-form shape has a casual look. |
| The octagon coffee table in the middle of the room was covered with a round doily and a vase of fresh flowers in the center. |
