Предмет: Математика, автор: NastiaAl2

Помогите пожалуйста,очень нужно

Приложения:

servetk: AD=2

Simba2017: б)верно, так как треугольники равны по 2 сторонам (радиусы) и углам(вертикальные), углы при основаниях в них равны, а они -пары накрест лежащий углов...

Simba2017: при равенстве накрест лежащих углов прямые параллельны

Simba2017: в)4

Simba2017: равносторонние углы со стороной 2, d=2R=2*2=4

Ответы

Автор ответа: Greyver

Пошаговое объяснение:

а) 2 см

б) Да, потому что края этих отрезков основаны на диаметрах и потому не могут отличаться

в) АОД - 60°. Это значит что верхний треугольник является равносторонним, то есть все стороны равны. А раз мы знаем что одна из сторон 2 см, то посчитать длинну диаметра не составит труда: 2*2=4

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