When putting two construction lines in a cross pattern with the origin dead center. I have no relations icons. Then I draw a 100 mm circle and dim it, I'm not defined.

But I'm following a video that shows the exact sketch and it's defined with relation icons.

youtube: Solidworks Tutorial 2 Modifying Sketches  Tim Callinan.

2 sketch, very beginning if any one would like to check out my issue.

Frank