As shown in the figure, in △ ABC, AE is the angular bisector, and ∠ B = 52 °, C = 78 ° to find the degree of ∠ AEB
In △ ABC, ∵ B = 52 °, ∵ C = 78 °, ∵ BAC = 180 ° - 52 ° - 78 ° = 50 °, ∵ AE is the angular bisector, ∵ BAE = 12 ∠ BAC = 12 × 50 ° = 25 °, ∵ AEB = 180 ° - 52 ° - 25 ° = 103 °
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