Wikipedia seems to help:
Simplex - Wikipedia, the free encyclopedia
I am telecom engr. and don't have v.good background in mathematics. I came across a problem where I have to find the volume of a simplex. I read some papers about calculating the volume of a simplex. But these papers talk about the polynomial related to the simplex. I don't know how do we get this polynomial from simplex. Let say I have a simplex in 2D (i.e. a triangle). I have its 3 vertices, how can I write a polynomial for this simplex?