Hexagon Makes how many Triangles

[rashmi.kaushal]

ABCDE is a regular pentagon with F at its center. How many different triangles can be formed by joining 3 of the points A, B, C, D, E and F?

a)10
b)15
c)20
d)25
e)30

C

[outreach]

6 points to make triangles. 3 pts will make a unique triangle
6C3 = 20

ABCDE is a regular pentagon with F at its center. How many different triangles can be formed by joining 3 of the points A, B, C, D, E and F?

a)10
b)15
c)20
d)25
e)30

C