Find the number of triangles in this figure?
Answer & explanation
Correct answer: option 4
Smaller triangles = (ABC) , (ACD) , (ADE) , (FGJ) , (GHJ) , (HIJ)
Triangles made by combination of 2 triangles = (ABD) , (ACE) , (AFG) , (AGH) , (AHI) , (FHJ) , (GIJ)
Triangles made by combination of 3 triangles = (ABE) , (FIJ)
Triangles made by combination of 4 triangles = (AFH) , (AGI)
Triangles made by combination of 6 triangles = (AFI)
Thus, total triangles = 18