10. T² = 17² - (12² + 9²)
= 289 - (144+81)
= 289 - 225 = 64
T = √64 = 8
V balok = 12 x 9 x 8 = 864 cm³ (B)
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10. T² = 17² - (12² + 9²)
= 289 - (144+81)
= 289 - 225 = 64
T = √64 = 8
V balok = 12 x 9 x 8 = 864 cm³ (B)