This gets back to reading . According to my post if you read it, I don't know the radius. I have rise/run of circular arch. No more. Just like with blueprints. They give you rise. They give you run. But to build it you need the radius. Which the plans don't ever give you. Answer.
(Rise)squared + (Span/2) squared
2 x Rise
Okay, but put it in the format shown above? Also, if you know the hypotenuse then the radius is easy. It seems you're being somewhat obtuse.The architect gives you AB, and S. But you need the radius (R) to draw the arch.