15. suppose that pq bisects ∠mpn. what conclusion can you make?

The bisector of an angle is a ray that separates the angle  into two congruent angles.

As, PQ bisects

then,

By the definition of congruent angle : An angle that have the same measure

As you can also see in the figure as shown below;

360 different combinations

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23