Archimedes
The branch of mathematics called trigonometry studies the relationships of lengths and angles of triangles. Three mathematicians who contributed to the development of trigonometry are: Pythagoras, Joseph Fourier, Norman J. Wildberger.
Trigonometry is the study of lengths and angles within triangles. Some mathematicians that have contributed to this branch of mathematics are: Hipparchus, Gemma Frisius, Leonhard Euler, Brook Taylor.
Euclid Rene Descartes Pythagoras Blaise Pascal Archimedes Bernhard Riemann
Leonhard Euler ,Gaspard Monge ,Jean-Victor Poncelet , Jakob Steiner
Well statisticians are those that study statistics. Usually they are some kind of scientist because they make observations and experiments. Or they are mathematicians... For some of the people who have contributed to the development of statistics over the years - see related link.
pythogoras
euler
Archimedes
Yes. There were mathematicians who were in geometry. In fact, anyone who contributed to our understanding of geometry was a mathematician.
Probably all mathematicians, from very ancient times.
Bolyai and Lobatschevsky
Arayabhatta and nikhil.n
The closest you will get is St Hubert - the patron saint of mathematicians
It has been known from very ancient times that the length of the diagonal of a unit square is not a rational number. There were no specific mathematicians who "discovered" real numbers. Furthermore, all mathematicians of any significance, contributed to our understanding of real numbers.
sir isaac newton
Probably several mathematicians have contributed. Cantor did a lot of the initial research on this topic.