Is it possible to divide a square into 2 obtuse triangles?

Yes, it is possible to divide a square into two obtuse triangles. One way to achieve this is by drawing a diagonal across the square, which creates two right triangles, and then further subdividing one of those right triangles by drawing a line from one of its vertices to the midpoint of the opposite side. This line can create two obtuse triangles, as the angles in those triangles can be adjusted to be greater than 90 degrees.