Angle B = 90 degrees, side BC = 20, angle Y = 90 degrees, and side YZ = 20. What additional information would you need to prove that ΔABC≅ΔXYZ by HL?
Angle A is congruent to angle X.
Angle B is congruent to angle Y.
Side AB is congruent to side XY.
Side AC is congruent to side XZ.

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