A seven sided polygon is called a?

A heptagon is a seven sided polygon or a septagon

A seven sided polygon is called a?

Step-by-step explanation:

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 septua-, a Latin-derived numerical prefix, rather than hepta-, a Greek-derived numerical prefix; both are cognate) together with the Greek suffix "-agon" meaning angle.