In elementary geometry, a polygon (/ ˈpɒlɪɡɒn /) is a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed polygonal chain or circuit. These segments are called its edges or sides, and the points where two edges meet are the polygon 's vertices (singular: vertex) or corners. The interior of the polygon is sometimes called its body. An n - gon is a polygon with n sides; for example, a triangle is a 3 - gon. A polygon is a 2 - dimensional example of the more general polytope in any number of dimensions.
what do you call a three sided polygon
triangle