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