apothem

ap.o.them

n.Mathematics （名词）【数学】
The perpendicular distance from the center of a regular polygon to any of its sides.
边心距：正多边形中心到其任意一条边的垂直距离

来源：
apo-
apo-
Greek thema [something laid down] * see theme
希腊语 thema [规定的事物] *参见 theme