Ever wondered how to draw a line parallel to given line and have it run through a predetermined point?
Needed analogue tools:
Dividers
Pencil
Straight Edge
Eraser
Constructing A Parallel Line Running Through A Point & Parallel To Another Line:
Given:
Line A-B (or say 2x4 piece)
Point C some distance off Line A-B
Set one leg of your dividers on point A, choose arbitrary radius.
Draw another circle with the same radius on point C.
Draw a line connecting points A and C, making sure the line crosses the second circle in Step 2.
Mark point F at the intersection of the line (Step 3) and the circle (Step 2).
Mark point D where the first circle (step 1) and line A-B intersect.
Add another one, E, where Step 1 circle crosses line A-C (Step 3).
Using the dividers, measure the D-E distance.
Draw a circle at F with radius D-E.
This circle and the one we built in Step 2 cross each other. Mark that as G.
With the straightedge and pencil draw a line passing through C and G.
The resultant line, C-G, should be parallel to the line A-B, passing through C.
You can download the CAD and GH (Rhino/Grasshopper) files here:
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