He read about it. The idea existed long before Pascal Pierre Raymond de Montmort, just named it after Pascal after Pascal used it to solve problems of probability theory.
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Blaise Pascal.
Blaise Pascal invented the first calculator and Pascals triangle.
Pascal didn't invent pascals triangle, he just made It popular. A Chinese mathematician invented it in about 1015.
The full name of the person who created Pascal's Triangle was Blaise Pascal. Pascal was a French mathematician, physicist, and philosopher who lived in the 17th century. He is best known for his contributions to mathematics, including the development of Pascal's Triangle, a triangular array of numbers with various mathematical properties.
pascals triangle