For triangles and for centrally symmetric convex bodies, the axiality is always somewhat higher: every triangle, and every centrally symmetric convex body, has axiality at least 2 ( 2 − − 1 ) ≈ ≈ 0.828 . In the set of obtuse triangles whose vertices have x -coordinates 0 , 2 , and 1 , the axiality approaches 2 ( 2 − − 1 ) in the limit as the y -coordinates approach zero, showing that the lower bound is as large as possible. It is also possible to construct a sequence of centrally symmetric parallelograms whose axiality has the same limit, again showing that the lower bound is tight.