Jawaban:
k=2(p+l)
40=2(12+l)
40:2=12+l
20=12+l
l=20-12
l=8
12×8
96 cm^2
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Jawaban:
k=2(p+l)
40=2(12+l)
40:2=12+l
20=12+l
l=20-12
l=8
12×8
96 cm^2