The Riemann sum method is a technique used to approximate the area under a curve by dividing the interval into small subintervals and summing the areas of rectangles. Each rectangle’s height is determined by the function’s value at a chosen point within the subinterval, and its width corresponds to the length of the subinterval. As the number of rectangles increases and their width decreases, the approximation becomes more accurate, approaching the exact area. This method is fundamental in calcu