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BAREШEK
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October 2021
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Найдите площадь треугольника со сторонами 3\7, 4\7 и 5\7 м.
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CupaCups
1) Периметр
P = ( 3\7 + 4\7 + 5\7 ) : 2 = 12\7 : 2 = 6\7
2) Площадь
S = V ( 6\7 * ( 6\7 - 3\7) * ( 6\7 - 4\7) * ( 6\7 - 5\7 ) = V 6\7 * 3\7 * 2\7 * 1\7 =
= V 36\7^4 = V ( 6^2 ) \ ( 7^4 ) = 6 \ 49 ( m^2 )
Ответ 6\49 m^2
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Answers & Comments
P = ( 3\7 + 4\7 + 5\7 ) : 2 = 12\7 : 2 = 6\7
2) Площадь
S = V ( 6\7 * ( 6\7 - 3\7) * ( 6\7 - 4\7) * ( 6\7 - 5\7 ) = V 6\7 * 3\7 * 2\7 * 1\7 =
= V 36\7^4 = V ( 6^2 ) \ ( 7^4 ) = 6 \ 49 ( m^2 )
Ответ 6\49 m^2