- Simple Riemann approximation using rectangles
- Generalizing a left Riemann sum with equally spaced rectangles
- Approximating distance travelled
- Approximating area under curve and sigma notation
- Using rectangles to approximate area under a curve
- Riemann sum when function is negative
- Riemann sums and sigma notation
- Rectangular and trapezoidal Riemann approximations
- Trapezoidal approximation of area under curve
- Trapezoid rule
- Riemann sums and integrals
- Ranking area estimates
- The definite integral as the limit of a Riemann sum
- Evaluating definite integral from graph
- Evaluating a definite integral from a graph