Based on the alternate interior angles theorem, the value marked b is calculated as: 190°
<h3>What is the Alternate Interior Angles Theorem?</h3>
The theorem states that two alternate interior angles are always congruent to each other.
The measure of angle b based on the alternate interior angles theorem would be:
m∠b = 50 + (320 - 180)
m∠b = 190°
Learn more about the alternate interior angles theorem on:
brainly.com/question/24839702
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