12. Observe the pattern made by the figures. Can you write a conjecture about the number of
triangles formed by connecting one vertex of
a polygon with n sides to each of the other
vertices? SEE EXAMPLE 2
A
Number
of Sides:
3
4
5
6

y = i/2 xtnop + (3i/2 tnop+ 1)

step-by-step explanation:

the picture is the step by step explanation.

the answer is a. 72. but i cant answer with less than 20 characters so here's some random text talking about it.

i believe its the last graph