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luas jjgenjang = s×s
s = 1/2 d1 kuadrat + 1/2 d2 kuadrat
= 3 kuadrat + 1,5 kuadrat
= 9+2,25
= 11,25
= √ 11,25
= 3,35
luas jjgenjang = s×s
=3,35×3,35
=11,2225 dibulatkan = 11,22
jadi luas 1 jjgenjang adalah 11,22
11,22 × 2 = 22,445 cm karna jjgenjang terdapat 2