This site includes a basic definition for what a diagonal of a polygon is along with a pictoral example.

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.

Find a definition of regular polygon, and learn how to calculate the internal angle, external angle, and number of diagonals of a regular polygon. Also, learn how to find the area of regular polygons.

This site gives a description of diagonals along with a visual representation. Be sure to follow the links to related terms, everyday examples, challenging problems, more information, and the interactive check point involving diagonals...

[Free Registration/Login may be required to access all resource tools.] In this lesson students calculate the area and perimeter of a rhombus or kite. Students examine guided notes, review guided practice, watch instructional videos and...

Based off of the hit television show NUMB3RS, this lesson shows students different ways to find centroids of regular polygons. The traditional way (using medians) is presented, as well as the triangulation method, the diagonals method,...

MathWorld provides the definition of a rectangle and the area formula of a rectangle.

Explore polygons with Wang, a ricksha puller. Answer his questions and he will give you a free ride!

Explains the basic concept of a square with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Incorporating concepts in algebra, number sense, patterning, data collection, and geometry, this activity engages students in various hands-on activities to explore the relationship between regular polygons and the number of diagonals...

Use this calculator if you know 2 values for the rectangle, including 1 side length, along with area, perimeter, or diagonals and you can calculate the other 3 rectangle variables. A square calculator is a special case of the rectangle...

Use this square calculator to find the side length, diagonal length, perimeter, or area of a geometric square. Given any 1 variable you can calculate the other 3 unknowns.