Tips & Tricks
There are 10 triangles in the figure, namely,
Triangles that are formed from point A: ABJ, and ABI
Triangles that are formed from point B: BIC, and BJI
Triangles that are formed from point C: CIH, and CHD
Trianglesthat are formed from point D: DHG, DGF, DFE, and DGE.
Hence, 10 is the correct answer.