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Mathematics, 20.10.2020 22:01 dxnimxriee

Elena wants to prove that the measures of the 3 angles in a triangle always sum to 180 degrees. She starts by using rigid motions to rotate triangle ABC 180 degrees around 2 midpoint
Explain how Elena labeled her diagram and finish her proof.


Elena wants to prove that the measures of the 3 angles in a triangle always sum to 180 degrees. She

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