Introduction

**Pascal's Triangle** can be produced by arranging the coefficients as the shape of triangle, when we expand (a+b)^{n}

This triangel is well known, and it has many interestign properties. First, we explain about Pascal's triangle and its properites in this web site. After that we present our research on triangles that are very similar to Pascal's triangle. We published our result in Mathematical Gazette 2012, and international conference JCDCG^3 2017.