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,...

This inquiry lesson explores the definitions of quadrilaterals and the properties of the diagonals of quadrilaterals to classify quadrilaterals. Students will work cooperatively to justify conclusions. This lesson plan was created by...

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

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

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.

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.