Which statements are true regarding the area of circles and sectors? check all that apply.
a. the area of a circle depends on the length of the radius.
b. the area of a sector depends on the ratio of the central angle to the entire circle.
c. the area of a sector depends on pi.
d. the area of the entire circle can be used to find the area of a sector.
e. the area of a sector can be used to find the area of a circle.