SAT Subject Test Mathematics Level 1

CIRCLES

The square  above,  with    sides   of  length  5,  has an  area    of   52     =   25.

92 .    Interior    Angles  of  a   Polygon

The sum of  the measures    of  the interior    angles  of  a polygon   =   (n  −   2)  ×

180 ,   where   n   is  the number  of  sides.

Sum of  the Angles  =   (n  −   2)  ×   180

The eight   angles  of  an  octagon,    for example,    add up  to  (8  −   2)  ×   180 =   1,080.

93 .    Circumference   of  a   Circle

Circumference   =   2πr