Вопрос школьника по предмету Геометрия
Две прямые касаются окружности с центром О в точках А и В и пересекаются в точке С. Найдите угол между этими прямыми, если угол ABO=50
Ответ учителя по предмету Геометрия
Ответ: 100°
Объяснение: угол ABO равен углу BAO=50°. Угол AOB равен 180°-50°*2=80°. Угол ACB равен 180°-угол AOB=180°-80°=100°
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