All sides of a regular heptagon are the same length. Each corner is 147.27°. All corners added together equal 6840°.
The amount of space a regular heptagon takes up is
a is the length of one of its sides.
Images for kids
Geometry problem of the surface of a heptagon divided into triangles, on a clay tablet belonging to a school for scribes; Susa, first half of the 2nd millennium BCE
Heptagon Facts for Kids. Kiddle Encyclopedia.