Math Open Reference: Perimeter of a Rectangle

Discover how to find the algebraic formula for the perimeter of a rectangle through this tutorial. Your algebra learners will be guided towards the thinking steps around this concept. After showing the video, invite your class to model...

Learn about the perimeter of a polygon with this resource which offers detailed explanations, examples, and an interactive. Subjects covered include how to find the perimeter. Links to related topics.

Learn about the perimeter of a parallelogram with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

Learn about the diagonals of a rectangle with this helpful reference tool. Provides a detailed definition, examples, and interactive activities that enhance further explanation. Includes links to related topics.

The teacher illustrates a diagram to help you learn about perimeter. First she adds the sides together to get the perimeter. Then she shows how to use the perimeter formula to make it a bit simpler.

Get the definition and properties of a polygon. Then explore such topics as: 1) types of polygon 2) area 3) Perimeter 4) angles associated with polygons and 5) names of polygons.

A complete reference guide to solid geometry. The mathematics resource provides definitions and interactive activities that enhance further explanation.

Follow along and learn the steps of how to prove the formula for the perimeter of a rectangle.

A handy reference guide to semicircles. It provides definitions and examples that enhance further explanation. Includes links to related topics.

Explore transformations of a polygon that include: 1) translation 2) rotation 3) reflection and 4) dilation.