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What is incorrect About this proof? What needs to be done to correct it?why ?

What is incorrect About this proof? What needs to be done to correct it?why ?-example-1
User Beef
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I think 3 and 4 are switched. 3 should be side- side-side congruence And 4 should be CPCTC. And in 3rd one it should be triangle ANX equals NBY
User Rafael Umbelino
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