How did pascal come up with pascal's triangle?

That's life.Pascal's triangle is a geometric arrangement of the binomial coefficients in a triangle, named after the mathematician Blaise Pascal in much of the Western world, although other...

blaise pascal didn't discover Pascal's Triangle the Persians and Chinese discovered it.

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Pascal didn't invent pascals triangle, he just made It popular. A Chinese mathematician invented it in about 1015.

Pascal's triangle was originally devised as a means of determining binomial coefficients: when calculating (x+y)^n, Pascal's triangle is a very convenient way to find the coefficients of the result....