The border of a susan
b. anthony dollar is in the shape of a regular polygon. how many sides does the polygon have what is the measure of each angle of the border round your answer to the nearest degree

Actually, the coin is round but it does contain an 11 sided polygon inscribed within the circle.
An eleven sided polygon is called a hendecagon  (from the Greek hendeka "eleven")
EACH interior angle measures (180 degrees -(360 / number of sides)) =
180 degrees -(360 / 11) =
180 degrees - 32.7272727273 =
147.2727272727  degrees
rounded to nearest degree = 147 degrees

Source:
http://www.1728.org/polygon.htm

Xis equal to three