In △ ABC, ∠ ABC = 90 degrees, D, E on AB, ad = AC, be = BC, try to judge whether the size of ∠ DCE is related to the size of ∠ B, if so, ask for the relationship between them, determine the degree, and explain the reason wait anxiously A |\E | D C -----------B Can't upload graphics, so that means. I hope I can understand it. A. B and C are △ and there are lines from e to C and D to C respectively.

In △ ABC, ∠ ABC = 90 degrees, D, E on AB, ad = AC, be = BC, try to judge whether the size of ∠ DCE is related to the size of ∠ B, if so, ask for the relationship between them, determine the degree, and explain the reason wait anxiously A |\E | D C -----------B Can't upload graphics, so that means. I hope I can understand it. A. B and C are △ and there are lines from e to C and D to C respectively.

According to your drawing, the problem should be ∠ ACB = 90
Then, DCE = 45, independent of B
Ad = AC, then ∠ ACD = ∠ ADC, i.e., ∠ ACD = (180 - a) / 2 = 90 - A / 2
Be = BC, then ∠ BCE = ∠ BEC, that is ∠ BCE = (180 - ∠ b) / 2 = 90 - ∠ B / 2
So: ∠ ACD + ∠ BCE = 180 - (∠ a + ∠ b) / 2 = 180-90 / 2 = 135
In addition, ACD + BCE = ACB + DCE = 90 + DCE
Then: ∠ DCE = 135-90 = 45
It has nothing to do with ∠ B