SOLUTION: Given: angle 2 and 4 are supplementary Prove: angle 1 is congruent to angle 3

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Question 996354: Given: angle 2 and 4 are supplementary
Prove: angle 1 is congruent to angle 3
Answer by ikleyn(52767) About Me  (Show Source):
You can put this solution on YOUR website!
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We don't know what are these angles, #1 and #3.

How can we prove whatever about them?