Did you know that two-dimensional shapes are also called polygons? This lesson describes the various 2-D shapes and includes two interactive games to reinforce skills.

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...

This website has basic definitions for most polygons, regular and irregular.

[Free Registration/Login Required] Students will explore polygons.

[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...

Vietnam War factual timeline featuring important dates, famous people involved in the war, and significant events that provide the history of the Vietnam War (November 1, 1955 - April 30, 1975) and its repercussions in the United States.

This SMART Notebook lesson allows students to characteristics of polygons by exploring vocabulary and sample problems.

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.

Find out how the First Amendment serves citizens in real life by reading about Daniel Ellsberg, Mary Beth Tinker, and Alton T. Lemon, all of whom were principal litigants in landmark Supreme Court cases regarding the freedom of expression.

Activity provides students the practice they need to master the skill of identifying shapes. Immediate feedback is given.

Activity provides students the practice they need to master the skill of identifying shapes. Immediate feedback is given.

Activity provides students the practice they need to master the skill of identifying shapes. Immediate feedback is given.

Use this calculator to calculate properties of a regular polygon. Enter any 1 variable plus the number of sides or the polygon name. Calculates side length, inradius, circumradius, area, and perimeter.

Introductory site on polygons, with exercises on the basic ones.

A plaque made of basalt, or a dark rock, in the shape of a rectangle is decorated with a pentagonal rose.

View photos and read personal stories about the September 11, 2001 attacks on the World Trade Center and the Pentagon.

View photos and read personal stories about the September 11, 2001 attacks on the World Trade Center and the Pentagon.

The terrorist attack at the Pentagon on September 11, 2001, is recalled at the trial at Zacarias Moussaoui. First-hand accounts are chronicled.

A great and very informative article about dissection tiling or tessellation.

This personal site presents some general information about polygons.

Identify architectural structures and objects in the community that represent different figures and types of geometry and mathematics.

[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.

Information from 2002 regarding developments in America's war on terror.