Calculus,IntegralsSeveral methods are used to estimate the net area between the x axis and a given curve over a chosen interval; all but the trapezoidal method are Riemann sums. In this Demonstration the lower limit is 0 and the upper limit is a. The area is the same number as the definite integral of the function f(x)Componente Curricular::Educação Superior::Ciências Exatas e da Terra::Matemática