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In the diagram below, lines X and Y are parallel and cut by a transversal. The measure of ∠1 is 65°.

Which argument explains why the measure of ∠3 is also 65°?

User Iiro
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1 Answer

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I don’t see a picture but based on the description you gave it’s because they’re vertical angles. This means they’re directly across from each other meaning they have the same measure.
User Pietrop
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