You guys know of any good site that explains fully about how Lambert proved that Saccerei’s acute angles does not result in a contradiction to the fifth postulate of Euclidean geometry? Thank you for any help(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Where is the Lambert prove?

**Physics Forums | Science Articles, Homework Help, Discussion**