What is the method of judging that two triangles are congruent? Are two sides and the diagonal of one side corresponding to two equal triangles congruent? Can you stitch these two triangles into an isosceles triangle by translation, rotation, or axis reflection? From the operation in (1) above, can you guess that these two right triangles are congruent? Please use reasoning to explain the correctness of your conjecture. Can you summarize the conclusions found above in words?
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