I'm trying to figure out a rendering angle for an orthographic camera based partially on isometric projection, in which the rendered result is that 2:1 width/ height ratio.

Where a top view is if I set the camera's angle to 90 degrees, and to achieve the 2:1 ratio, it's set to 30 degrees, making the height look to be half of the width.

What I need to know is what the camera's angle must be set to in order to get the height to be 1.8 times the width.

I've been looking around for formulas of some kind and have found nothing so far in order to make a conversion somehow. Eventually, this is going to be used to sort graphic tiles in an MMF project of mine.