Whoever gets this correct first gets brainlest

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

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?

One of the problems with our current election system is? ?