As shown in the figure, in △ ABC, ∠ C = 90 °, CD ⊥ AB, CM bisects AB, CE bisects ∠ DCM, then the degree of ∠ ace is______ .

As shown in the figure, in △ ABC, ∠ C = 90 °, CD ⊥ AB, CM bisects AB, CE bisects ∠ DCM, then the degree of ∠ ace is______ .

In ∵ △ ABC, ∵ C = 90 °, ∵ a + ∵ B = 90 °, ∵ CD ⊥ AB, ∵ ADC = 90 °, ∵ a + ∵ ACD = 90 °, ∵ ACD = ∵ B, ∵ cm bisecting AB, ∵ am = BM = cm, ∵ BCM = ∵ B, ∵ BCM = ∵ ACD, ∵ CE bisecting DCM, ∵ DCE = ∵ MCE, ∵ ACD + ∵ DCE = ∵ BCM + ∵ MCE =