Third Kamikare
10/03/2017 at 20:05
Faded 26/01/2018 at 12:29
A C D E B
The quadrilateral ABED interior of the circle with diameter BD. In the triangle BED, the angle BDE = 1800  (450 + 900 ) = 450. So that. the angular measure BAE = the angular measure BDE = 450 .
So the angular measure BDE = 45

mathlove 12/03/2017 at 18:13
The quadrilateral ABED interior of the circle with diameter BD. In the triangle BED, the angle BDE = 180^{0}  (45^{0} + 90^{0} ) = 45^{0}. So that. the angular measure BAE = the angular measure BDE = 45^{0} .
So the angular measure BDE = 45^{0}

Thiên Tuyết Linh 12/03/2017 at 10:37
90 degrees