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Penjelasan dengan langkah-langkah:
1) K = 4s = 4 KL = 4×13 = 52cm
L = ½ d1.d2 = ½×KM×LN = ½×10×24 = 120cm²
2) K = AB+BC+CD+DA
K = 18+10+(18-6)+8
K = 48cm
L = (a+b)/2 ×t
L = (AB+DC)/2 ×CE
L = (18+(18-6))/2 ×8
L = (18+12)/2 ×8
L = 30/2 ×8
L = 120cm²
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