SOLUTION: Hello. Can someone help me about how did Lambert tried to disprove the parallel postulate of Euclid? And explain how did he came up with the Lamberts Quadrilateral? Thank you

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Question 1145141: Hello. Can someone help me about how did Lambert tried to disprove the parallel postulate of Euclid? And explain how did he came up with the Lamberts Quadrilateral? Thank you
Answer by ikleyn(52946) About Me  (Show Source):
You can put this solution on YOUR website!
.

(a)   How did Lambert tried to disprove the parallel postulate of Euclid 

    Read this article from the Internet

        https://www.math.upenn.edu/~kazdan/proof/notes/parallel-postulateGrabiner2009.pdf


    There is nothing more enjoyable than to read from good sources (!)