Find the measure of the missing angle using the triangle angle sum theorm

asked Aug 19, 2022 96.0k views

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Answer:

31°

Explanation:

The theorem states that all angle sums of any triangle add up to 180°.

128 + 21 = 149, and to find ?°, subtract 149 from 180 to get 31°.

Jon Hoffman answered Aug 25, 2022

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