По формуле Герона
p = a + b + c 2 = 1 2 (14 + 12 + 8) = 17
S = √p(p - a)(p - b)(p - c) =
= √17(17 - 14)(17 - 12)(17 - 8) =
= √17·3·5·9 = √2295 = 3√255 ≈ 47.90615826801394
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По формуле Герона
p = a + b + c 2 = 1 2 (14 + 12 + 8) = 17
S = √p(p - a)(p - b)(p - c) =
= √17(17 - 14)(17 - 12)(17 - 8) =
= √17·3·5·9 = √2295 = 3√255 ≈ 47.90615826801394