12. Five marks example problem II

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.

 

 

Answer:

 

Area of the tile $=$  $sq. \ units$

 

Area of the floor $=$  $sq. \ units$