in the above figure it consist 8 triangle so that no. of square is 3 so that total no. of triangle is 8 ✖ 3=24

and 4 triangle shown in question figure so that answer is 24+4=28 

In this figure counting the squares and we get the 27 squares.

in the figure the 8 triangle is shown easily and another is COD , DOB, BOA, AOC, ACD, BDC,ABC, ABD so that total no. of triangle is 8+8=16

The triangle 6 shown in figure and another is ADB,ACB, BDC,ADC, so that total number of triangle is 10