bevelled
Sloped at edges
Bevelled describes an edge or surface cut at an angle rather than squared off.
A bevelled mirror has edges ground to slope inward.
Bevelled glass refracts light distinctively.
The spelling with double L is British; Americans write beveled.
The carpenter bevelled the edge of the tabletop.
angled
Turned from perpendicular
diagonal · sloped · slanted · truncated · asymmetric · angular · pitched · canted · skewed · tapered
chamfer
Angled corner cut
cant · facet · edge · cut · plane · grind · taper · carve · shape · rout
edge angle/cut
bevelledsquare
Rhombus with right angles
perpendicular · straight-cut · right-angled · orthogonal · flat