The following technique shows how to copy an angle (on a piece of paper):
Needed analogue tools:
Dividers
Pencil
Straight Edge
Eraser
Given:
Angle A-B-C
Desired:
Copy Of A-B-C
Using your dividers, draw an arch with center at B and arbitrary radius.
Mark the first intersection as e.
Mark the second as b.
Stretch the divider's legs as wide as the e-b distance.
Draw a line at random length and direction and mark points D and E on it. D is at the end of the line.
Draw an arch with center D and radius B-e (as in Step 1).
Mark point h at the intersection of the arch and line D-E.
Using h as a center, draw another circle/arch with radius that equals that of e-b (Step 4).
Mark as i the intersection of the two arches/circles (Step 6 & 8).
Finally, connect D and i to form a new line D-i.
The D-i line together with D-E form an angle that equals A-B-C.
You can download the CAD and GH (Rhino/Grasshopper) files here:
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