irishvball7
irishvball7
04.11.2020 • 
Mathematics

<1 and <2 are adjacent and supplementary. <2 and <3 are adjacent and supplementary. Which statement must be true? A. m<1 = m<3

B. m<1 is not equal to m<3

C. m<1 + m<3 = 90 degrees

D. m<1 + m<3 = 180 degrees

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