In: Math
Describe, in plain language, how the Riemann Sum method approximates the area under a curve.
Note: As we keep on decreasing width, the no. of rectangles increases and thus, for a very small width of dx, the no. of rectangles increases so much that the approximation almost gives the actual value. That's why, the definite integral method of calculating area is simply approximating it with fine accuracy that gives the actual value of the area under the curve.