that's not a Draughtman's Right Angle like you so incorrectly stated. Its's a right angle triangle (and not all of them are transparent or UNUSED).
So what IS the draughtsman's right angle you are referring to? That's the picture I'd like to see
that's not a Draughtman's Right Angle like you so incorrectly stated. Its's a right angle triangle (and not all of them are transparent or UNUSED).
So what IS the draughtsman's right angle you are referring to? That's the picture I'd like to see