Butter side-up
It is easier to use a chart and protractor. that way you can use any navaid of your choice to cross-check....furthermore it covers the case of a particular navaid being out of service or out of range.
Most ATC units can provide a track and range to any point on request....it is our job to help you.....and may assist in the initial heading before you've got set up; we can even give you your estimated time for any waypoint.
Regards