Question

I don't understand how to find missing endpoint pls help

Answer 1

subtract the midpoint numbers from endpoint b

x coordinate: 3- -1 = 4

y coordinate: -5 -2 =-7

now subtract the x number from the midpoint and add the y number to the midpoint

-1 -4 = -5

2- - 7 =9

missing endpoint is (-5,9)