Question

внешний угол при вершине С треугольника АВС прямой . какой вывод можно сделать о внутренних углах данного треугольника​

Answer 1

Ответ:

прямоугольный треугольник с двумя острыми и одним прямым углами

Answer 2

Triangle ABC and its External Angle

When the external angle at vertex C of triangle ABC is a right angle, it means that the angle formed by extending side AC beyond vertex C and side BC is a right angle. This can lead to several conclusions about the internal angles of the triangle.

Conclusion: The internal angles of the triangle can be deduced based on the properties of triangles and the relationship between internal and external angles.

The sum of the internal angles of a triangle is always 180 degrees. Therefore, when the external angle at vertex C is a right angle, it means that the sum of the internal angles A and B must be equal to 90 degrees, as the external angle and the internal angles are supplementary.

This leads to the conclusion that the sum of the internal angles A and B of triangle ABC is 90 degrees when the external angle at vertex C is a right angle.