Предмет: Геометрия, автор: gucigabriel599

Даю 80 баллов решите умоляю

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Ответы

Автор ответа: duisenbaiakbota7

1

ответ: дано:ad=cd

ao=ob;co=od

bd=12см

доказать:треугольник aoc=треуголнику boD

найти:ac

решение:расс трекгольник aoc=трругольник bod

1)угол bod=углу coa -вертикальные

AOC=BOD

2)oB=OA-по условию => по 2 сторонам и углу между ними

3)CO=OD-по условию

т.к тругольник AOC=BOD то,AC=BD=>AC=12cм

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