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Nomor a)
AC² = AB² + BC² , di mana AC=sisi miring.
AC² = 9² + 12²
AC² = 81 + 144
AC² = 225
AC² = 15²
AC = 15
Nomor b)
CE² = CA² + AE² , di mana CE=sisi miring.
CE² = 15² + 20²
CE² = 225 + 400
CE² = 625
CE² = 25²
CE = 25
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