C.TO FIND THE AREA OF THE SHADED REGION, YOU NEED THE AREA OF THE...
59. c.To find the area of the shaded region, you need the area of the inner circle subtracted from the outerA r
2
circle. Since the formula for the area of a circle is , you need to know at least the radius ofeach circle. Statement (1) gives you the area of the inner circle only, but no information about theouter circle. Statement (2) tells you the diameter of the outer circle is 20, so the radius is 10. Bothstatements are needed to answer the question.