# Determine How Many Rectangles in a Diagram of Overlapping Rectangles

This video explains how to find all of the rectangles in a figure of three intersecting rectangles.

# Problem Solving with Area and Perimeter of Rectangles (Version 1)

This video explains how to solve a problem using area and perimeter of rectangles.

# Problem Solving with Area and Perimeter of Rectangles (Version 2)

This video explains how to solve a problem using area and perimeter of rectangles.

# Ex: Approximate the Area Under a Curve Using Rectangles (Left Using Graph)

This video explains how to use rectangles to approximate the area under a curve.  The left side approximation is used.  The function values must be estimated from the graph.

# Ex: Approximate the Area Under a Curve Using Rectangles (Right Using Graph)

This video explains how to use rectangles to approximate the area under a curve.  The right side approximation is used.  The function values must be estimated from the graph.

# Ex: Approximate the Area Under a Curve Using Rectangles (Midpoint Using Graph)

This video explains how to use rectangles to approximate the area under a curve.  The midpoint aproximation is used.  The function values must be estimated from the graph.

# Area Under a Graph Using Rectangles – Application

This lesson explains how to use rectangles to approximate the upper and lower sum of the area under a graph.  The meaning of the area is emphasized.