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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.
2. Write down the formula for finding the area of a triangle. The formula for this type of problem is Area = 1/2(base x height) , or 1/2(bh) . Once you write it down, you can begin to plug in the lengths of the height and base.. Write down the formula for finding the area of the triangle. The formula for finding the area of a triangle with two known sides and a known included angle is the following: Area = 1/2(b)(c) x sinA. In this equation, b and c represent the lengths of the sides and A represents the angle.