Apothem -- From Wolfram MathWorld

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Apothem Apothem

Given a circle, the apothem is the perpendicular distance r from the midpoint of a chord to the circle's center. It is also equal to the radius R minus the sagitta h,

r=R-h.

For a regular polygon, the apothem simply is the distance from the center to a side, i.e., the inradius r of the polygon.

See also

Chord, Circular Sector, Circular Segment, Inradius, Radius, Regular Polygon, Sagitta

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Cite this as:

Weisstein, Eric W. "Apothem." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Apothem.html

Subject classifications

  • Geometry
  • Line Geometry
  • Chords
Created, developed and nurtured by Eric Weisstein at Wolfram Research

Tag » What Is An Apothem In Geometry