Subject :IMO Class : Class 2

How many groups of 2 triangles can be formed from triangles given in box?

A 14

B 10

C 7

D 5

how is it 7

Subject :IMO Class : Class 2

How many groups of 2 triangles can be formed from triangles given in box?

A 14

B 10

C 7

D 5

how is it 7