Предмет: Геометрия, автор: artyompetnitsky

10баллов 1 задача найти x​

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Ответы

Автор ответа: ludmilaksenija2005
2

Объяснение:

из теоремы косинусов:

АС=√(АВ²+ВС²-2•АВ•ВС•соsB)=

=√(6²+(3√2)²-2•6•(3√2)•cos45)=

=√(36+18-2•6•(3√2)•(√2/2))=

=√(36+18-36)=√18=3√2

Автор ответа: zmeura1204
0

Ответ:

х=3√2од.

Объяснение:

Проведемо висоту СН.

∆СНВ- прямокутний рівнобедрений трикутник. кути при основі рівні 45°

СН=НВ.

СН=СВ/√2=3√2/√2=3 од

НВ=3 од.

АН=АВ-НВ=6-3=3од.

Теорема Піфагора:

АС=√(СН²+АН²)=√(3²+3²)=3√2од

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