1. ∠А = ∠С = 50 °, since, according to the properties of an isosceles triangle, the angles on the AC side are equal.
2. The bisector AD divides ∠A into two angles of equal magnitude:
∠ВАD = ∠САD = 25 °.
2. Based on the fact that the total value of the angles of the triangle ACD is 180 °, we calculate the value of ∠ADC:
∠АDС = 180 ° – ∠АСD – ∠САD = 180 ° – 50 ° – 25 = 105 °.
Answer: ∠ADC is equal to 105 °.
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