Предмет: Математика, автор: yeban94

В равнобедренном треугольнике один из внешних углов равен 80. Найдите углы при основании

Помогите пожалуйста

Я много баллов дам

Ответы

Автор ответа: Пеппер
2

Ответ:

40°   40°

Пошаговое объяснение:

Если в равнобедренном треугольнике внешний угол меньше 90°, то этот треугольник тупоугольный, а тупой угол находится при вершине.

Тогда сумма углов при основании равна внешнему углу при вершине

углы при основании по 80:2=40°

yeban94: Спасибо большое
Автор ответа: aristoktararistokrat
0

Теорема :

  • Углы при оснований в равнобедреном треугольнике равны

Сумма при оснований равна 80° , а углы при оснований равны, тогда 80÷2=40°

Ответ: углы при оснований равны по 40°

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