Angie and Becky each completed a separate proof to show that the measures of vertical angles AKG and HKB are equal. Who completed the proof incorrectly? Explain.

Becky, because her reason I'm step 2 does not justify her 2ndbstatement.

Step-by-step explanation:

Two angles which add up to give 180° are said to be defined as supplementary angles.

The Definition of Supplementary Angles is the most appropriate statement to justify the second statement in the proof, as written by Angie, compared to the Angle Addition Postulate stated by Becky.

The Angle Addition Postulate does not justify why the two of angles both equal 180°. According to the Angle Anldditiin Postulate, sum of 2 angles that share the same side can does not necessarily have to be 180°. It could be less than or greater than 180°.

Therefore, Becky completed her proof incorrectly.

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