unable to fully constrain with arc
I'm having trouble fully constraining a sketch that includes a center arc.
I've attached a sketch for reference. After creating a rectangle and the necessary construction lines for the arc, I can't seem to fully constrain the entire sketch. I've tried this both with and without the lower line of the rectangle.
I'm wondering if there's something I'm overlooking. Is it possible that the sides of the rectangle and the arc are not truly coincident, even though they appear to be touching when zoomed in?
Any guidance you can provide would be greatly appreciated.
