SAT Subject Test Mathematics Level 2

In the figure above, the radius is 6, and the measure of the sector’s central angle is 30 ̊. The sector
has or of the area of the circle:

FOUR CIRCLE FORMULAS

Circumference   =   2πr =   πd

Area    of  a   Circle  =   πr^2

CIRCLES COMBINED WITH OTHER FIGURES

Some of the most challenging plane geometry questions are those that combine circles with other
figures.