Exercise 15 Page 46

An acute angle is an angle smaller than $90^{\circ }.$ Let's draw our acute angle by comparing it to an arbitrary right angle.

Now, to construct its bisector, we will put the compass point on the vertex $Q$ and draw an arc that intersects the sides of $\angle PQR.$ We need to label the points of intersection for future reference. Here we will call these points $M$ and $N.$