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AE = AB = BC = CD = x
lihat segitiga ABE
karena AB = AE, maka BE = x√2
CE = √(16² - x²)
CE = √(256 - x²)
BE = √(√(256 - x²)² - x²)
BE = √(256 - x² - x²)
BE = √(256 - 2x²)
√(256 - 2x²) = x√2
kuadratkan kedua ruas
256 - 2x² = 2x²
256 = 2x² + 2x²
256 = 4x²
x² = 256/4
x² = 64
x = 8
Jadi, panjang AE = 8 cm