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k = 2(p+l)
46 = 2 ((L+7 ) + L)
46 = 14 + 2L
2L = 32
L = 16
P = L + 7 = 16 + 7 = 23
Luas = P x L = 23 x 16 = 368 cm²
46=2(l+7)+l)
46=14+2l
46-14=2l
32=2l
32/2=l
16=l
l=16
p=16+7=23
L=23 ×16=368cm ²