Question 5
In an archaeological excavation of an ancient tomb, archaeologists found a broken ancient circular disk. The archaeologists want to restore the shape of this disk. To determine the radius of the disk, the archaeologists took 3 points on the disk and measured them, obtaining the results as shown in the figure (AB=4.3 cm, BC=3.7 cm, CA=7.5 cm). What is the radius of this disk?
