If triangle MNP has vertices at M(-5,-7), N(7,-2) and P(2,10) is triangle MNP and isosceles? Provide evidence to support your claim.

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. two motorists are driving cars on the highway on opposite sides of the plane, and the angle of depression to one car is 35 ̊ and to the other is 52 ̊. how far apart are the cars?