What is the length of the line segment with endpoints (3,-2) and (3,3)

Answer 1

d^2 = (x1-x2)^2 + (y1-y2)^2

distance squared = sum of squares of the 2 sides of a right triangle

d^2 = 0^2 + 25

d = 5

Of course, you could have seen that immediately when both x coordinates are equal. That leaves the difference in y coordinates as the distance between the 2 points: 3- -2 = 3+2 = 5