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AC² = AB² + BC²
= 8² + 3²
= 64 + 9
AC² = 73
AC = √73 cm
diagonal ruang
EC² = AB² + BC² + CG²
= 8² + 3² + 6²
= 64 + 9 + 36
EC² = 109
EC = √109 cm
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diagonal ruang EC =
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