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 .

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} .