As shown in the figure △ ABC, ad is the angle bisector, AE is high ∠ B = 60 °∠ C = 40 ° to find the degree of ∠ ADB and the degree of ∠ DAE

As shown in the figure △ ABC, ad is the angle bisector, AE is high ∠ B = 60 °∠ C = 40 ° to find the degree of ∠ ADB and the degree of ∠ DAE

According to the principle of triangle inner angle sum, it is concluded that: ∠ a = 80 °, AE is the angle bisector, and ∠ EAC = 40 °. In triangle AEC, according to the principle of triangle inner angle sum, ∠ AEC = 100 °, and ∠ DEA and ∠ AEC are complementary angles, and ∠ DEA = 80 °. Ade is right angle. In triangle ade, according to the principle of triangle inner angle sum, ∠ DAE = 10 °