As shown in the figure, in △ ABC, a = 70 ° and B = 50 °, CD bisects ACB, and calculates the degree of ACD

As shown in the figure, in △ ABC, a = 70 ° and B = 50 °, CD bisects ACB, and calculates the degree of ACD

∵∵ a = 70 °, ∵ B = 50 °, ∵ ACB = 180 ° - 70 ° - 50 ° = 60 ° (triangle internal angle and definition). ∵ CD bisection ∵ ACB, ∵ ACD = 12 ∵ ACB = 12 × 60 ° = 30 °