In an isosceles triangle ABC with the base of the AC, the bisector AD is drawn, find the angle ADC if the angle C is 50 degrees.
Since ABC is an isosceles triangle, angle A is equal to angle C (in an isosceles triangle, the angles at the base are equal), angle A = 50 °.
Since AD is a bisector, the DAC angle is 50 °: 2 = 25 °.
The angles in a triangle add up to 180 °. In triangle ADC: angle ADC = 180 ° – (50 ° + 25 °) = 105 °.
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.