SAT Subject Test Mathematics Level 2

SOLIDS

The area    of  the circle  is  π(4)^2  =   16π.

96 .    Area    of  a   Sector

A   sector  is  a   piece   of  the area    of  a   circle. If  n   is  the degree  measure of  the sector’s    central angle,

then    the formula is

In  the figure  above,  the radius  has a   length  of  6,  and the measure of  the sector’s    central angle   is

30  degrees.    The sector  has     of  the area    of  the circle:

97 .    Tangency

When    a   line    is  tangent to  a   circle, the radius  of  the circle  is  perpendicular   to  the line    at  the point

of  contact.