Jawabanmu

2014-02-13T10:06:13+07:00
L. Persegi panjang = 2.(Panjang+Lebar) = 2. (12cm+16cm) = 2. 28 cm = 36 cm2
Semoga membantu :)
2014-02-13T10:13:57+07:00
L. Persegi panjang = 2.(Panjang+Lebar) = 2. (12cm+16cm) = 2. 28 cm = 36 cm2