User blog comment:Rainsplash987/Orthocenters are the real enemy/@comment-5019333-20141025213801

Like V33, I wish I could help you but I basically have no idea what you're talking about

Perpendicular Bisectors:

bi = two

sector = I just think of them as sections

two sections + perpendicular + moments of thinking = my only guess is a line that makes another line perpendicular (90 degree angles) - like a plus sign. I would think that without "perpendicular" in the mathmatical term, a bisector would be one of the lines in, perhaps, an "x", as they don't line up in 90 degree angles.

I don't know Dx

Good luck with your homework; so sorry I can't help you that much :c