Arc AB= arc AF push-out angle AFB= angle ABF.

And because the angle is not good+angle ABF+ angle FBD = 90°, it is perpendicular to BC from AD.

Because arc AB+ arc AF+ arc fc = 90,

So angle Abe+angle AFB+ angle FBC=90 degrees.

So: angle BAD= angle AFB, so: angle BAE= angle ABE: AE=BE.

Best answer

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