I believe the answer you are looking for is 2 angles
The a point is refrected through the line y = x, the new point is found by interchanging the x and y-cordinate of the original point. i.e. if the original point is (a, b) and is refrected through the line y = x, the new point will be (b, a).
The number is 8 because 4 times 8 equals 24 plus 2 is 26