SOLIDWORKS Design & Help

You have multiple dimensions angles, radius, height and width in this file. You can easily identify the diameter or radius.

I provided the solution to this over here:

https://grabcad.com/groups/technical-drawing-drafting/questions/i-need-help-with-this-drawing

The drawing provides all the information necessary, if you properly constrain the sketch.

You can Insert the drawing as a Sketch Picture and scale it properly and find the missing dimension!

That dimension is not required to fully define the profile the profile.

Yep, I saw your link and you are right, however what the was missing here is the extension line that you show as amber 👍

Yes but care must be taken in using self instincts to judge results dimensions.