Which of the following are essential characteristics needed to properly define a circle select all that apply a the measure of the radius be a set of points on a plane see a line drawn through space specified point de the measure of an angle that forms the sector cs central fixed point the measure of circumference scorin which of the following are essential characteristics needed to properly define a circle select all that apply a the measure of the radius be a set of points on a plane see a line drive through his business specified point de the measure of an angle that forms the sector see a central fix point the measure of the circumference