Question: How many non-overlapping triangles can we make in a-n-gon (polygon having n sides), by joining the vertices?
(a)n-1
(b)n-2
(c) n – 3
(d) n – 4
Solution:
(b) The number of non-overlapping triangles in a n-gon = n – 2, i.e. 2 less than the number of sides.
