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Not sure of the title of this paradox so I didn't know how to search the forums

This also reminds me of this (Concave and Convex by MC Escher):

this is like my other post

Well, this isn't really homework. What I'm actually trying to do is find h, and I have a way to do that if I know theta. So, I'd appreciate help with finding theta, but if you can do h, that works too. (This is actually a really simplified version of the problem. In reality, the circle is a sphere, and h is the distance of a line that intersects perpendicularly with the center of a small circle within the sphere, whose center lines up with a point on the surface of the sphere. Didn't know how to draw that, so help me find h or theta pl0x?) All I've managed to establish is that the angle to the left of theta will be 135, regardless of h.