So the angle is 90 degrees.
So the angle BEF= angle CED, and the sum of the two angles is equal to 90 degrees.
Because angle b equals angle C=90 degrees.
So angle CED= angle BFE
So BEF is equal to CED.
So BE=CD
Because CD=AB
So BE=AB
So the angle BAE is equal to 45 degrees
AE average score ∠ bad