Draw straight lines as required and add the angle dimensions. You can then put those line on hidden layer or make them very tiny in length
Yes, if you have SW 2016. You can dimension a line in reference to the Up/Down/Left/Right directions (Horizontal and Vertical).
Do not need to draw a construction line anymore.
1. Start Dimension tool
2. Select the line or edge
3. Select an end point of that line
4. Select a direction (click on the head of the arrow).
5. Select the quadrant.
I can't tell from the .jpg but are you talking about angle dimensions that are minutes and seconds? Perhaps?
So you are wanting foreshortened dimensions. I have done foreshortened radius dims but have never tried angles. I think I saw something about foreshortening being improved in 16 but I don't know for sure. I will do some looking.
Having said that I have to say foreshortening isn't working worth a hoot ATM. SW Help only mentions foreshortening linear dims but having done it with a radius before I created both an angular and a radius to try. I don't get the option to show up for the angle and I am having to manually move the cut on the radial one. I think my problem is that the dim is probably set to center on the leader and I haven't shut it off but you can see what I am doing. I think you will have to "fake" the leaders for angular dims.