Jawaban:
Panjangnya 12 cm dan Lebarnya 8 cm
Penjelasan dengan langkah-langkah:
Kll = 2(p+l)
40 = 2(x + 4 + x)
20 = 2x + 4
16 = 2x
x = 8
P = x + 4 = 8+4 = 12
L = x = 8
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Jawaban:
Panjangnya 12 cm dan Lebarnya 8 cm
Penjelasan dengan langkah-langkah:
Kll = 2(p+l)
40 = 2(x + 4 + x)
20 = 2x + 4
16 = 2x
x = 8
P = x + 4 = 8+4 = 12
L = x = 8