Originally Posted by

**Rhoops** I'm trying to ascertain some angles from a 'circle within a square'. Where the circle intersects the square at four points, and then separates, as a quadrant, then a quarter way round intersects the square again. I'd like to be able to work out the angle at some points along the circle edge in relationship to the square...

So to simplify it... I've drawn it! See attachment.

There are two angle concepts, the red one from the point of intersection of circle and square, and the blue one which is a subsequent angle, having ascertained two of the red angle...I guess.

Any help with this would be much appreciated.