Question

What is the best way to measure a segment you want to copy?

Place a drafting compass point at one end of the segment you want to copy and the pencil at the other end.
Place a protractor on the end of the segment and measure the angle it makes.
Place a compass on the line segment you want to copy and see where the compass needle points to.
Place a string on the segment you want to copy and knot each end of the string at the ends of the line segment you want to copy.