Question 28
A tiger’s triangular forest territory has a large oak, pine and sua tree at its vertices. The midpoint from the oak to the pine has a small sua tree; the midpoint from the pine to the sua tree has a small oak; the midpoint from the sua tree to the oak has a small pine, as shown. The distances between the two oaks, two pines and two sua trees are 36 km,39 km,15 km respectively. What is the territory’s area?

