(1) They wore dark blue and red armor, and had a gold heptagon tattooed over their elongated green faces.

(2) The book promptly answered his question: A heptagon has seven sides.

(3) A heptagon whose sides have length 2 is too large to fit tightly around a circle with radius 1.

(4) High above us, the great heptagon of the Winter sky: Capella, Aldebaran, Rigel, Sirius, Procyon, Pollux, and Castor (with Saturn nearby) - with Betelgeuse in the center and the Milky Way cascading through, just to the left of Orion.

(5) In this case, all of the points lying along a line through this circle's center and perpendicular to the plane of the heptagon are equidistant from the polygon's vertices.

(6) Construct a heptagon , given the seven points that are the midpoints of its sides.

(7) Some coins have a rounded heptagonal shape that allows their use in slot machines designed for ordinary coins.

(8) In the Korean myth, the hero's legitimate son is recognized when he is able to find half of his father's sword at the base of a pine tree growing out of a heptagonal stone.

(9) He took note through the clear glass walls of the heptagonal room that the employees were still working, even at the ungodly hour of 4 a.m. on a Sunday morning.

(10) They were in the heptagonal room in the middle of the agency floor.

(11) They suggest that the magnetic behavior is due to the complex microstructure of the foam in which they observe heptagonal structures having an unpaired electron.