The Washington Post
The Washington Post: Sacred Ground, Remembering the Victims
Victims of the tragic events of September 11th, Pentagon, World Trade Center, and United Flight 93 Pennsylvania, are listed and remembered in this special project.
Texas Instruments
Texas Instruments: Measuring Polygons an Introduction to Cabri Jr.
This activity is designed as an introduction to using the Carbri Jr. application on the TI-83+/84+ calculators. Students are guided through the menu system and are shown how to draw triangles, quadrilaterals and and a pentagon. Perimeter...
CNN
Cnn: September 11 Memorial
This site was established by CNN to serve as an "evolving record" of and "living memorial" to those who perished in the attacks of September 11, 2001.
The Math League
The Math League: Figures and Polygons
This site provides definitions of different types of polygons and figures.
CBS
Cbs News: Photos Capture Pentagon Attack
News article from March, 2002, chronicling photos taken at the Pentagon during the September 11, 2001, attack. There are links to other related articles and resources from this web page.
PBS
Pbs Mathline Lesson Plan: Struts'n Stuff [Pdf]
Incorporating concepts in algebra, number sense, patterning, data collection, and geometry, this lesson engages students in various hands-on activities to explore the relationship between regular polygons and the number of diagonals...
Other
Ic Teachers: Shapes: Polygons
The properties of the four different types of polygons--pentagons, hexagons, heptagons, and octagons--are discussed here. Some practice questions are also given to test your knowledge.
Other
United States Department of Defense: Pentagon Tours
This site from the U. S. Department of Defense provides official information on the Pentagon, the United States headquarters of the Department of Defense. Includes the Pentagon's history, a virtual tour, and information on a visit to the...
CK-12 Foundation
Ck 12: Elem Math: Identifying Polygons and Ellipses
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to look at images and identify ellipses and different types of polygons. Includes video demonstrating a sample problem...
Other
Transition Mathematics: Polygons
This site has an extensive definition of a polygon. The definition is followed by multiple-choice questions that ask the student to name specific polygons. There is a link for more questions about polygons.
Khan Academy
Khan Academy: Us History: Period 9: 1980 Present: September 11th
An overview of the terrorist attacks on the World Trade Center and the Pentagon that resulted in the United States' declaration of a Global War on Terror.
Math Open Reference
Math Open Reference: Pentagon (5 Gon)
Learn about pentagons with this resource which offers detailed explanations, examples, and an interactive. Subjects covered include properties of decagons. Links to related topics.
OER Commons
Oer Commons: Pre Assessment
Students solve for missing angle measures by applying what they have learned about types of angles and the angle measures of polygons. Students do a pre-assessment at the end of the lesson.
Digital Public Library of America
Dpla: Attacks on American Soil: Pearl Harbor and September 11
The resources here, including cartoons, photographs, paintings, and posters, represent both events in order to compare them.
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: Area, Surface Area, and Volume Problems
A guide to support parents as they work with their students with area, surface area, and volume problems.
E-learning for Kids
E Learning for Kids: Math: Riksjas, Toek Toek: Polygons
Explore polygons with Wang, a ricksha puller. Answer his questions and he will give you a free ride!
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Polyhedrons
This in-depth paper examines the idea of convexity. Euclid's Elements, the first geometry textbook, assumed convexity without mentioning the term.
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...
The Math League
The Math League: Figures and Polygons
This website has basic definitions for most polygons, regular and irregular.
PBS
James Goodale: The Interview
An interview with James Goodale, the general counsel for "The New York Times" during the Pentagon Papers case, concerning the Pentagon Papers and the First Amendment.
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...