I believe it is 15 if the model is drawn to scale, this is because x and the other ray of 15 are both connected to the vertex P and extend to the edges
Multiply 12 x 12 which is 144. And then you divide that by 6 and you get 24
It's about 94.3m
You have to find the length of the diagonal, subtract the diameter of the circle, then add half of the circumference
