


Challenge 


Central angle:
Central angles are angles in which the vertex of the angle is the center of a circle. 
Angles in a Circle: Investigate how the location of an angle's vertex affects its relationship to the measure(s) of the arc(s) it intercepts.
Area of a Sector: Determine a relationship between the area of a circle's sector and the radius and central angle of the circle, and between the arc length of a sector and the radius and central angle of the circle.


