In a right-angled triangle ABC with a right angle C, the outer angle at the vertex A is 125 degrees. Find the angle ABC.
| April 9, 2021 | education
1. Proceeding from the fact that, according to the condition of the problem, the value of the external angle at the vertex A of the triangle is equal to 125º, we calculate the value of the internal angle ABC, subtracting it from the value of the expanded angle:
180 – 125 = 55º.
2. We calculate the value of the angle ABC:
180 – 55 – 90 = 35º.
Answer: the angle of the triangle at the vertex A is 35º.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
