Description for Correct answer:


The Triangles are

AIB, BIJ, BCJ, CJK, CKD, DKL, DLE, AIH, IJH, JHG, JKG, KGH, KLF, LEF, BAJ , DK, AJH, EKF, BAH, BHJ, BCH, BHG, DEF, DKF, DGF, CDF, HF, BDG.

There are 28 triangles.