pnjng persegi pnjng 2x lebarnya jika luasnya 128cm maka pnjng persegi pnjng adlh

panjang = 2 x lebar
lebar = lebar
luas = 128 cm²

luas = panjang x lebar
128 = 2 x lebar x lebar
64 = lebar²
lebar = √64 = 8 cm
panjang = 2 x 8 = 16 cm

#semoga membantu