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= (5+√2)² + (5-√2)²
= 25 + 10√2 + 2 + 25 - 10√2 + 2
= 54
sisi miring= √54 = 3√6
Keliling= 5+√2 + 5-√2 + 3√6 = 10 + 3√6
maaf apabila jawaban yang saya berikan kurang tepat