apothem(redirected from apothems)
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The perpendicular distance from the center of a regular polygon to any of its sides.
[apo- + Greek thema, something laid down; see theme.]
(Mathematics) the perpendicular line or distance from the centre of a regular polygon to any of its sides
[C20: from apo- + Greek thema, from tithenai to place]
a perpendicular from the center of a regular polygon to one of its sides.
[1855–60; < French apothème]