On the coordinate plane, triangle XYZ has vertices at (1, 1), (3, 3), and (5.5, -2.5), respectively, (1, 1) (5.5, -2.5) Which of the following could be used to prove that triangle XYZ is an isosceles triangle? Show both A and B. O show that 1 x - x,)+(2 - Y, J is equal for exactly two of the sides, Show that (Y2-11) (42-44) is equal for exactly two of the sides, Show the slopes for two of the sides are negative reciprocals,