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=8×4 × 12
= 384
L.alas × t
L.alas =
½ × a × t
a= 8
t = ?.
t² = c² - b²
= 8² - 4²
= 64 - 16
t = √ 48
= 6,9
½ × 8 × 6,9 = 27,6cm²
(=) 27,6 × 12 = 331,2cm³
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