How many sides has a heptagon
Heptagon Heptagon In geometry, a heptagon is a seven-sided polygon or 7-gon. The heptagon is sometimes referred to as the septagon, using "sept-" (an elision of "", a Latin-derived numerical prefix, rather than "", a Greek-derived numerical prefix) together with the Greek suffix "-agon" meaning angle. A regular heptagon, in which all sides and all angles are equal, has internal angles of 5π/7 radians (128 degrees). Its Schläfli symbol is {7}. The area ("A") of a regular heptagon of side length "a" is given by: This can be seen by subdividing the unit-sided heptagon into seven triangular "pie slices" with vertices
Heptagon by Schläfli symbols {7/2}, and {7/3}, with the divisor being the interval of connection. <br>Blue, {7/2} and green {7/3} star heptagons inside a red heptagon. The United Kingdom currently (2011) has two heptagonal coins, the 50p and 20p pieces, and the Barbados Dollar is also heptagonal. The 20-eurocent coin has cavities placed similarly. Strictly, the shape of the coins is a Reuleaux heptagon, a curvilinear heptagon to make them curves of constant width: the sides are curved outwards so that the coin will roll smoothly in vending machines. Botswana pula coins in the denominations of 2 Pula, 1 Pula, 50