Asked by Billy

the vertices of a parallelogram are a(3,-1),b(4, 3),c(7, 5), and d(6, 1). at what point do the diagonals intersect?
Answered by Steve
assuming the diagonals are ac and bd, then they bisect each other. The midpoints of the ac abd bd are

(5,2) and (5,2).

Hmmmph. whaddaya know!