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The floor of a hall is covered with identitcal tiles which are in the shapes of triangles. One such triangle has the vertices (-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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Answer:
 
Area of the tile =  sq. \ units
 
Area of the floor =  sq. \ units