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

Find The Measure Of The Missing Angle Using The Triangle Angle Sum Theorm class=

Sagot :

IshNoodlez

Answer:

31°

Step-by-step 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°.

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