Which pair of triangles can be proven congruent by the HL theorem? 1) 2 triangles have 2 congruent sides and 1 congruent angle.

2) 2 right triangles have a congruent hypotenuse and another congruent side.

3) 2 right triangles have 1 congruent side. The congruent side for one triangle is its hypotenuse.