_Line - Perp, Tan, Extension don't work

any idea why I can’t click and execute them? even going on the right buttons, Perpendicular Line doesn’t work on circles etc. You can drag the end point where you want but not perpendicular at all…

It works here. Start the line command pick the perpendicular option, select the circle to be perpendicular from and you’ll see the white tangent line indicator. Drag your pointer away from the circle and you’ll see a preview of the line coming perpendicular from the circle.