# The floor of a hall is covered with identical tiles which are fis triangles. One such triangle has the vertices at $(-3,2),(-1,-1)$ and $(1,2)$. If the floor of the hall is completely covered by 110 tiles, find the area of the floor.

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The floor of a hall is covered with identical tiles which are fis triangles. One such triangle has the vertices at $(-3,2),(-1,-1)$ and $(1,2)$. If the floor of the hall is completely covered by 110 tiles, find the area of the floor.