What are the coordinates of the point on the directed line segment from (-9, -3) to (-6,9) that partitions the segment into a ratio of 5 to 1?

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.