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cari d2 = 5 kuadrat - 13kuadrat => 169-25 : 144 diakarkuadrat-> 12cm
luas : 1/2 . d1 . d2 => 1/2 . 10 . 12 = 60cm
semoga membantu ya
52 = 4s
s = 52/4
= 13 cm
L = 1/2 X s1 X s2
= 1/2 X 10 X 12
= 60 cm²