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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.
Jennifer Roth. Construct a circle of radius AB from a point on a line, and a a circle from another point C on the same line with radius AB (AC has to be greater than or equal to 2AB). Where these two circles intersect, is your third point for your isosceles triangle (there are two such points).