#euclidpostulatesUnmoderated tagAll postsExplore CommunitiesTrending CommunitiesSteemitCryptoAcademyNewcomers' Communityআমার বাংলা ব্লগKorea • 한국 • KR • KOSteem AllianceSTEEM CN/中文Steem POD TeamComunidad LatinaWORLD OF XPILARTron Fan ClubBeauty of CreativityAVLE 일상#euclidpostulatesTrendingHotNewPayoutsMutedsamanfatma (25)in #euclidpostulates • 3 years agoWhy did Euclid prove his first four postulates? Why didn't he prove his fifth postulate (parallelism)?Euclid's first four postulates are often referred to as the "common notions," as they are basic assumptions that are…