Geomantic taboo of triangular architecture?

Geomantic omen, triangular houses are unlucky, hurting people externally and hurting people internally (corners), mainly manifested as eye diseases. Of course, this form of housing is also easy to solve, that is, cutting off sharp corners. Of course, it is not for you to tear down the triangle, but to decorate the sharp corners inside and outside into a streamlined shape, so that they look smooth and smooth from a distance.