Aladder that is 15 feet long reaches the window of a building 12 feet above the ground .whaf is the distance from the base of the ladder to the building?

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