"an auditorium has 21 rows of seats. the first row has 18 seats, and each succeeding row has two more seats than the previous row. how many seats are in the auditorium? "

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

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.

I'm confused on this could anyone me and show me what i need to do to solve it.