In construction, all you need is a compass and a ruler.
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None normally in a regular 5 sided pentagon but it is possible to construct an irregular pentagon with a pair of parallel sides.
A straight edge or a rule are used to construct straight lines. Laser line setter, In some cases a plumb line
you can coordinate parallel because parallel lines never touch or cross
A straight-edge
Corresponding angle are used to prove if lines are parallel. If they are congruent then the lines cut by the transferal are parallel.