As shown in the figure, if there is a point E in the square ABCD and the triangle EBC is an equilateral triangle, what is the degree of ∠ bea?

Because the triangle EBC is an equilateral triangle and the square ABCD
So EB = BC, BC = AB, ∠ EBC = 60 ° and ∠ ABC = 90 degree
So EB = AB, ∠ Abe = 30 degree
Therefore, BAE = bea
So ∠ bea = (180 ° - 30 °) / 2 = 75 °

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