Total number of figures in bigger triangles ABC,
Trick = 1 + 2 + 3 + 4+ 5 + 6 = 21
Total number of triangles in smaller triangle BDH= 1+ 2+ 3 + 4 = 10
Total number of triangles in the figure = Total number of figures in bigger triangles ABC + Total number of triangles in smaller triangle BDH + triangle ( AED + AGD + ABD + AHD )
= 21 + 10 + 4 = 35 | 
