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Luas KLMN.
L = KN x NO
L = 16 x 18
L = 288 cm²
c.)
Luas lagi:
L = MN x NP
288 = 28 x NP
NP = 288/28
NP = 72/7 = 10 2/7 cm
NP ≈ 10,2857... cm
b=16 cm
K = 2a + 2b
2(28)+2(16)
56+32
88