[Killa[DGZ]]

Is anyone able to help me out with the workings for a symmetrical arched type object movement from say point (A) to (B), with the vertex (Z) being half the length between those two points?

I can't seem to grasp the whole concept to be honest and the more trigonometry and algebra based shit I read on the internet the more I become confused and can't think for the life of me, you know.. being an old fart an all lol.


Any help will be very much appreciated, thanks