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Jadi :
20√3 = s√3 ⇒⇒⇒⇒√3 dengan √3 dicoret
20 = s
s = 20 cm
Luas Permukaan = 6 x s²
Luas Permukaan = 6 x 20²
Luas Permukaan = 6 x 400
Luas permukaan = 2.400 cm²
Semoga membantu ^_^