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= 10² - (4² + 2²)
= 100 - (16 + 4)
= 100 - 20
d² = 80
d =√80
= 4√5
maaf, kalau salah banget.. taunya kayak gitu, semoga membantu
= √(10² - (4 + 2)²)
= √(100 - 36)
= √64
= 8 cm