Geometry > 9.1.2 Developing Formulas for Circles and Regular Polygons > Flashcards
circle
the locus of points in a plane that are a fixed distance from a point called the center of the circle
center of a regular polygon
equidistant from the vertices
apothem
the distance from the center to the side of a regular polygon
central angle of a regular polygon
has its vertex at the center, and its sides pass through consecutive vertices