SOLUTION: Two column proof. Click the link to view the problem. https://ibb.co/KshCHQh

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Question 1177469: Two column proof.
Click the link to view the problem.
https://ibb.co/KshCHQh
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!



m∠1 + m∠2 + m∠3 = 180°         Sum of angles of a triangle is 180°



m∠4 + m∠3 = 180°               Supplementary angles add to 180°



m∠1 + m∠2 - m∠4 = 0           Subtracted bottom eqn from top eqn



m∠1 + m∠2 = m∠4               Added m∠4 to both sides, (DONE)