In △ ABC, be bisects ∠ ABC, ad is the height on BC, and ∠ ABC = 60 ° and ∠ BEC = 75 ° to calculate the degree of ∠ DAC

In △ ABC, be bisects ∠ ABC, ad is the height on BC, and ∠ ABC = 60 ° and ∠ BEC = 75 ° to calculate the degree of ∠ DAC

The ∵ be bisects ∵ ABC, and ∵ ABC = 60 °, ∵ Abe = ∵ EBC = 30 °, ∵ C = 180 ° - ∵ EBC - ∵ BEC = 180 ° - 30 ° - 75 ° = 75 °, and ∵ C + ∵ DAC = 90 °,