When
you construct parallel lines you have to copy an angle by creating
arcs with a compass. For inscribed polygons you also have to use a
compass in order to be sure that the figure is a regular polygon.
There for the when you are constructing inscribed polygons and
parallel lines, A compass is used to draw arcs.
Answer:
C) A compass is used to copy an angle.
I
hope it helps, Regards.
