Problem 46 of 7
Use alternate interior angles with parallel lines from alternate interior angles are 5z+15 and 2z+60 degrees.
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identify congruent alternate interior angles.
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Lines must be parallel and angles must be alternate interior angles.
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Solution
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1. Identify the alternate interior angle pair.
2. Confirm the lines are parallel.
3. Set their measures equal and solve.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Treating same-side interior angles as congruent.