trying to make a pattern

hey guys, i don't how to use the site yet.

so i thought i would try instead of reading and searching cuz i am kinda on a deadline

and plz excuse my poor english.

i am trying to reach a line between two evaluate curves.

if it is possible to do, then i'm facing a problem having the two points split when i select them so i can connect each one to A and C in "arc 3p"

thanks.