Предмет: Геометрия, автор: Adelina000p

В треугольнике abc угол а равен 90 градусов угол с на 10 градусов меньше угла b.найдите угол b

Ответы

Автор ответа: ХитрыйБездельник
0
составим и решим уравнение
пусть угол с - х, тогда угол б - х+10. Сумма углов в треугольнике = 180 градусов, значит уравнение будет выглядеть следующим образом
х+х+10+90=180
2х=180-90-10
2х=80
х=80:2
х=40
Угол б = 40 градусов
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