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AllenWeiser1
@AllenWeiser1
March 2022
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Найдите большую диагональ параллелограмма со сторонами 2см., 3см. и углом 120°
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nafanya2014
Verified answer
По теореме косинусов
d²=2²+3²-2·2·3·cos120°; cos 120°=-1/2
d²=19
d=√19
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Answers & Comments
Verified answer
По теореме косинусовd²=2²+3²-2·2·3·cos120°; cos 120°=-1/2
d²=19
d=√19