This is another one that I cannot explain the why. But if you delete the "equal curvature" relations and add equal radius on your arcs then you can dim to the point of intersection of the angled lines.

Edit:.. Actually you don't need the equal on the arcs since you have a horizontal relation on the endpoints of the arcs. Just delete the equal curvature (again don't ask me why) and add the dim to the intersecting points.

This is another one that I cannot explain the why. But if you delete the "equal curvature" relations and add equal radius on your arcs then you can dim to the point of intersection of the angled lines.

Edit:.. Actually you don't need the equal on the arcs since you have a horizontal relation on the endpoints of the arcs. Just delete the equal curvature (again don't ask me why) and add the dim to the intersecting points.