**Problem : **
What two geometric figures form the boundary of a sector? A circle segment?

**Problem : **
If a central angle is 45 degrees, what is the measure of the major arc
whose endpoints are at the intersection of the
central angle and the circle?

**Problem : **
When does a circle segment lie entirely within a sector?

**Problem : **
If two different diameters are drawn into a circle, how many sectors are
defined?

**Problem : **
If the chord AB is perpendicular to the diameter PQ, and Q lies on the minor arc whose endpoints are A and B, what
is the relationship between arc AQ and arc BQ?