Given: <1 and <2 ar… - QuestionCove

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Mathematics 9 Online

OpenStudy (anonymous):

Given: <1 and <2 are supplementary AD=BC Prove: ABCD is a parallelogram.

13 years ago

OpenStudy (anonymous):

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13 years ago

OpenStudy (anonymous):

Please help!

13 years ago

OpenStudy (mertsj):

Is this supposed to be a formal 2 column proof?

13 years ago

OpenStudy (anonymous):

yes.

13 years ago

OpenStudy (anonymous):

And I know how to write proofs, I just don't know how to prove that it's a parallelogram, I don't know where to start with just those two pieces of info

13 years ago

OpenStudy (mertsj):

If angle 1 and 2 are supplementary, then AD //BC because if same side interior angles are supplementary, then the lines are parallel.

13 years ago

OpenStudy (anonymous):

Oh!!!!! Thank you soooo much!

13 years ago

OpenStudy (mertsj):

13 years ago

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