tolong pake cara nya , cepat ya

[tex]luas \: = p \times l \\ 120 = 12 \times l \\ 120 \div 12 = l \\ l = 10cm \\ maka \\ k = 2 \times (p + l) \\ k = 2 \times (12 + 10) \\ k = 2 \times (22) \\ k = 44 \: cm[/tex]