The correct answer to this open question is the following.
Unfortunately, you forgot to include the picture of the building. Without it, there is no way we can know what you are talking about.
However, trying to offer some help we did some deep research and found a large gray building made on concrete with angles and curves in its forms. If that is the case, then we can say that the significance of the angles and curves on the building above is that they recall the Sanskrit letter forms.
These types of buildings represent the modern architecture in places like India and Nepal. After the Independence of India in 1947, architecture was off of the arts that modernized, Indeed, modern art is very important in that nation.
The postmodernist architecture allows the development of innovative designs that include angles, curves, and other geometrical forms not included in traditional forms of architecture.