Three vertices of parallelogram PQRS are p (-3,-2), q(1, -5) and r (9,1) with p and r diagonally opposite. The sum of the coordinates of vertex s is: A. 13
B. 12
C.11
D.10
E.9

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.