Предмет: Геометрия, автор: Demon1235

Допоможіть будь ласка тільки номер 473 (1,2)

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Автор ответа: balabu

1) за властивістю, катет проти кута 30° в п/к трикутнику = половині гіпотенузи, отже СВ=АВ:2=12:2=6см

2) за тією ж властивістю:

АВ=ВС*2=3*2=6дм

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