in this case, the vector is passing through a right angle as shown with the little square on the left side. (all right angles equal 90 degrees) so you would simply subtract 64 from 90. (90 - 64 = 26) so x equals 26 degrees.
Did u see little square on the lines!? That hint to tell u that this is 90 degrees each. Two angles makes 180 degrees. If one angles is 90 degrees. We need to find x that can be plus to 64 to get 90 degrees So 90=x+64 90-64=x 26=x ANSWER FOR X IS 26 To check: 26+64=90 90=90 It correct!!!
