Answer:

Step-by-step explanation:

18-4= 16

16/2= 8 units

8 is the answer

Verified answer

Answer:

Step-by-step explanation:

Perimeter= 18 cm

unequal side= 4cm

let equal sides= x

perimeter =x+x+4=18

                   2x=14

                    x=7

ans: 7cm