Mathigon
Mathigon: Geometry: Polygons and Polyhedra: Quadrilaterals
This lesson focuses on quadrilaterals which can fall into multiple categories based on the number of sides and the angles.
History is Fun
Jan Brett: Geometric Shapes Flashcards Pdf
Print out these colorfully illustrated PDF file pages to practice learning your basic two dimensional geometric shapes. Fold them in half and one side shows the shape while the other side shows the shape with the correct name. Put them...
Other
Algebra Lab: Areas and Perimeters of Triangles and Special Quadrilaterals
Learn how to find the areas and perimeters of triangles and special quadrilaterals.
Ducksters
Ducksters: Kids Math: Quadrilaterals
Explore four-sided polygons called quadrilaterals on this site.
ClassFlow
Class Flow: Segments and Polygons
[Free Registration/Login Required] This flipchart reviews segments, parallel and perpendicular lines and then introduces polygons including quadrilaterals. It has many real world examples of shapes and includes Activote assessment.
ClassFlow
Class Flow: Two Dimensional Shapes Identify and Match
[Free Registration/Login Required] This flipchart helps students to analyze and compare various two-dimensional shapes according to the vertices, sides and parallel lines. It features "containers" created in Version 3 (can be used with...
Rice University
Rice University: Cynthia Lanius: Hidden Polygon Activity
On this site students are instructed to locate different types of polygons on triangle grid paper. This page can be printed so that students can actually draw them. It also gives a definitions link for each polygon.