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Use the image below to answer questions 9-12 find the measure of angle 3

Use the image below to answer questions 9-12 find the measure of angle 3-example-1
User UberJason
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Angle 3 would be 123. Angle 2 is 12 and angle 4 is 39.

The reason angle 3 is 123, is because straight lines are 180 degrees. the neighboring angle is 57, therefore, 180-57 = 123

User Hassek
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