16. 

Find the number of triangles in the given figure.

A. 23
B. 27
C. 29
D. 31

17. 

Find the number of triangles in the given figure.

A. 36
B. 40
C. 44
D. 48

18. 

Find the number of triangles in the given figure.

A. 15
B. 16
C. 17
D. 18

19. 

Find the number of triangles in the given figure.

A. 8
B. 10
C. 12
D. 14

20. 

Find the number of triangles in the given figure.

A. 8
B. 10
C. 11
D. 12