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In the diagram, angle 3 is x + 30 and angle 4 is 2x - 80.  What is the measure of angle 3?

 

 Apr 20, 2020
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They are opposite angles of intersecting lines so they have to equal each other

 

 

3x+30 = 2x-80    solve for 'x'   then angle 3 = x+30

 Apr 20, 2020

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