Recent content by The mentalist

Hello everybody, Eratosthenes of Cyrene ( 276 BC– 195 BC) was a Greek mathematician, geographer, poet, astronomer, and music theorist.The interesting thing about his biography,is that he was able to measure the Earth's circumference using only simple tools and good geometry .here is a video...

Hello everyone, Can you please show me how to 'determine weather this funtion -3[(x-3)^2-9] is increasing or decreasing on the the domain [0,6] Thanks in advance .

No,I am just quoting your words .Ok ,so would you give some exemples on constructions work based on spherical geometry.

Ok, so let's assme that we want to build on very large scale ,what will we use in the place of euclidean geometry,since it will break down ?

Hello everybody, Based of some information that I recently learnt(which I don't know if they are right or wrong), I start asking myself this question about the euclidean geometry. Ok, this geometry is basically founded on straight lines, and what I have learned is there is no such a thing as a...