<< Hexagon   -   Octagon >>

A polygon of seven sides, having an internal angle sum of 900 degrees.

For a regular heptagon with sides of length x,

Area = x²3.634


If each corner of a regular heptagon is connected to all other corners with a straight line, the heptagon becomes divided into 50 areas:

• 35 triangles:
  • 21 isoceles
  • 14 scalene
• 7 quadrilaterals
• 7 pentagons
• 1 regular heptagon

Hep"ta*gon (?), n. [Gr. sevencornered; "epta` seven + angle: cf. F. heptagone.] Geom.

A plane figure consisting of seven sides and having seven angles.

 

© Webster 1913.