How to construct parallel lines using a straight edge and a compass
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Draw a line with you straight edge and put one point on the line and label it 1. Then put one point off the line and label it 2.
Connect point 1 and 2 with a straight edge.
Draw an arch at point 1.
Copy that arch at point 2.
Measure the arch at point 1 with your compass.
Then make an arch the distance of point 1's arch at point 2.
Finally, draw a line with your straight edge through point 2 and where the two archs intersect.