Please answer and give me an explanation thank you ​

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

Find the multiplicative inverse of 8-12i

In the diagram, points d and e are marked by drawing arcs of equal size centered at b such that the arcs intersect ba and bc. then, intersecting arcs of equal size are drawn centered at points d and e. point p is located at the intersection of these arcs. based on this construction, m , and m