SOLUTION: write a two-column proof given <1 and <2 form a linear pair <2 and <3 are supplementary proven <1=<3

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Question 219394: write a two-column proof
given <1 and <2 form a linear pair
<2 and <3 are supplementary
proven <1=<3
Answer by susanaramya(12) About Me  (Show Source):
You can put this solution on YOUR website!
<1+<2=180(linear pair)
<2=180-<1
<2+<3=180(supplementary)
180-<1+<3=180
<3=180-180+<1
<3=<1