Drawing arc parallel with border of semiround watch

Former Member
Former Member
Hi, I"m trying to draw an ARC in my datafield. I'm targetting the ForeRunner 230 and 235 in particular.
I'm trying to reach the same kind of arc that the movementbar on the standard watch face is.

If I'm drawing a circle using height / 2 and width /2 as center point, width/2 as radius, and draw the circle, It seems that the border of the watch, and my circle is not 'parallel'.
How is this?

How can I draw an arc that IS parallel with de border of my semi-round watch?