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How to Construct Pascal's Triangle. In Pascal's Triangle, the top row is 1, with the second row just below it containing 1 and 1. To construct each subsequent row, add each pair of numbers, moving from left to right so that each number on a row is the sum of the two numbers just above it, to the right and the left.Put a 1 on both ends of each row.o construct each subsequent row, add each pair of numbers, moving from left to right so that each number on a row is the sum of the two numbers just above it, to the right and the left. Put a 1 on both ends of each row.
Applying Pascal's formula again to each term on the right hand side (RHS) of this equation, n. 5 C 3 = 3 C 1 + 2(3 C 2) + 3 C 3 5 C 3 = 3 + 2(3) + 1 = 10. for all nonnegative integers n and r such that 2 r n + 2. Use this formula and Pascal's Triangle to verify that 5 C 3 = 10.