Triangle hfg has been dilated with point h as the center of dilation. which reason justifies the congruence of ∠hjk to ∠hfg and ∠hkj to ∠hgf?

a) ∠h is a right angle
b) the triangles are congruent
c) jk || fg
d) fh ⊥ hg

Short Answer C <<<< answer
The fact you dealing with a right angle doesn't really come into the picture.

The picture shows that the triangles are not congruent (you shouldn't use a picture but I have. It makes the explanation easier.)

D is another way of expressing A. The rt angle doesn't make any difference.

The parallel lines are what makes the difference.