Answer:
∠ABE = 45°
Step-by-step explanation:
Since we know that the figure is a square, we know that ∠A, ∠B, ∠C, and ∠D are all 90°.
Assuming that Point E is at the center of the square, the lines will bisect each of the angles above. Half of 90° would be 45°.
∠ABE = 45°.
