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Why is the math problem about folding ∠ A = ∠ Abe = ∠ CBE = 30?
∫△EBD is folded by△ AED, ∴△AED and △EDB are the same, ∴∠ A = ∠ EBD.

∫△EBD is folded by △CEB, ∴△CBE and △EBD are congruent, ∴ △ CBE = ∠ EBD.

∴∠A=∠ABE=∠CBE. European Development Bank

∫△AED and△△△ EDB are identical.

△CBE and△△ EBD are congruent.

So three triangles are congruent.

AD=BD=CB

∴CB= half AB

∫∠C = 90。

∴∠ A = 30 degrees (the opposite side of the 30-degree angle is equal to half of the hypotenuse)

∴∠A=∠ABE=∠CBE=30

Do you understand, smart guy?