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l = l
K = 2 ( p + l )
28 = 2 ( 2 + l + l )
14 = 2 + 2l
7 = 1 + l
l = 6 cm
p = 2 + l
= 2 + 6
= 8 cm
L = p × l
= 8 cm × 6 cm
= 48 cm²
28 cm = 2p + 2l
p = 28/4 = 14
2p = 14/2 = 7
p = 7 + 1 = 8
p = 7 + 1 = 8
l = 28/2 = 14
2l = 14/2 = 7
l = 7 - 1 = 6
l = 7 - 1 = 6
Pembuktian
Keliling = 2p + 2l
= (6+6) + (8+8)
= 28
Yang di tanya =
Luas = Panjang x lebar
= 8 x 6
= 48 ( C.48 )