9.1.2 Developing Formulas for Circles and Regular Polygons

Question 1

circle

Answer 1

the locus of points in a plane that are a fixed distance from a point called the center of the circle

Question 2

center of a regular polygon

Answer 2

equidistant from the vertices

Question 3

apothem

Answer 3

the distance from the center to the side of a regular polygon

Question 4

central angle of a regular polygon

Answer 4

has its vertex at the center, and its sides pass through consecutive vertices