Find the number of triangles in the given figure.
The simplest triangles are AEH, EHI, EBF, EFI, FGC, IFG, DGH and HIG i.e. 8 in number. The triangles composed of two components each are HEF, EFG, HFG and EFG i.e. 4 in number. Thus, there are 8 + 4 = 12 triangles in the figure.
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