Question

Three resistances each of 6 are connected in form of a triangle

Answer 1

R = R1+ R2 + R3
R = 6+6+6
R=18

Answer 2

heya☺

I think in form of triangle two resistance are connected in series .

so,the equivalent resistance will be .
6+6 =12.ohm.

and,again .
. anothe resistances is connected in parallel then it equivalent persistence will be .

1/12+1/6

=3/12

=4ohm.

hope it help you.

@rajukumar☺