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Mathematics 21 Online
OpenStudy (anonymous):

Given the diagram below, Gitta writes m1 + m2 + m3 = 180degrees. Which of the following reasons allows her to write this statement? http://media.apexlearning.com/Images/201306/26/0ce851da-4074-4e35-a0c9-d01c412b19d7.JPG A. Exterior angles theorem B. Subtraction property of equality C. Definition of linear pair D. Triangle sum theorem

OpenStudy (anonymous):

is it a

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