A certain circular area has its center at point P and has radius 4, and points X and Y lie in the same plane as the circular area. Does Point Y lie outside the circular area?
1) The distance between point P and point X is 4.5
2) The distance between point X and point Y is 9
1: tells us about the d for X, but nothing about y. Insuff.
2: D btwn x and y is 9. could be in or out of the circle.
Together suff: y is outside the circle by .5.
Also we cant have the line go way outside the circle (essentially the opposite way). Its not possible under these constraints