Does anyone know how to prove this?

Match the term on the left with its image or description on the right. match term definition diameter a) circle a and a line segment connecting points b and c which are on the circle. circumference b) circle a and a line segment connecting points b and c which are on the circle. radius c) a piece of the circumference of a circle secant d) two circles that share the same center. concentric circles e) the distance around a circle arc f) a segment between two points on a circle that passes through its center

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Find the dimensions of the circle. area = 64π in.² r= in.