Name of distance from center to side of rectangle

Question

Is there a special name for the distance from the center of a rectangle to a side? I haven't done geometry in a while, but I thought there was an equivalent of a "radius" for regular polygons.

Answer 1

Maybe the word you want is apothem. But that only applies to squares, not rectangles in general.

Or perhaps you want inradius, although that's usually for triangles.