In the isosceles RT triangle ABC, ab = AC, angle BAC = 90 degrees, be bisection angle BAC intersects AC at e, CD is made through C, be is perpendicular to D, and ad is connected

In the isosceles RT triangle ABC, ab = AC, angle BAC = 90 degrees, be bisection angle BAC intersects AC at e, CD is made through C, be is perpendicular to D, and ad is connected

Method 1: ab = AC, ∠ BAC = 90 °, then ∠ ACB = 45 °. ∫ BAC = ∠ BDC = 90 °. Points a, B, C, D are on the same circle with BC as the diameter. ∫ ADB = ∠ ACB = 45 °. & nbsp;; method 2: make AF ⊥ ad, intersect BD with F. ∫ fad = ∠ BAC = 90 °. ∫ DAC = ∠ Fab; ∫ BAE = ∠ CDE = 90 °; ∠ bea