I need some help please

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Issof claims that the scale factor is 1/2. which statement about his claim is correct

Given: hf || jk; hg ? jg prove: fhg ? kjg to prove that the triangles are congruent by asa, which statement and reason could be used as part of the proof? fgh ? kgj because vertical angles are congruent. jkg ? hfg because vertical angles are congruent. fhg ? jkg because right angles are congruent. hfg ? kjg because alternate interior angles are congruent.