Identify and compare shapes based on their attributes. Shapes include triangle types, quadrilateral types, pentagons, and hexagons. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...

Need a pentagonal pyramid that's six inches tall? Or a number line that goes from -18 to 32 by 5's? You can create all those things and more.

When the plane crashed in a Pennsylvania field on September 11, it was 20 minutes flying time from the nation's capital. On the morning of September 11, 2001, 46 minutes into United Airlines Flight 93, a nonstop flight from Newark, New...

This lesson focuses on polygons; a polygon is a closed, flat shape that has only straight sides. Polygons can have any number of sides and angles, but the sides cannot be curved.

Learn all about the basic properties of equilateral. This lesson targets the meaning of equilateral, shows how to construct equilateral shapes, explores some of the equilateral shapes and properties, and how to apply them while solving...

Learn about hexahedrons and hexahedral graphs from MathWorld.

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 Library of Congress has received original material including photographs, drawings, poems, eye-witness accounts, maps, and much more concerning the attacks on September 11th. They have archived this is a special exhibition.

This site provides definitions of different types of polygons and figures.

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

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

Winding down the war in Vietnam took several years. Read about Richard Nixon's plans for Vietnamization and "peace with honor." Find out how other events in Vietnam pushed the antiwar movement to even more demonstrations.

[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...

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.

This is the text, audio, and video of General Ann E. Dunwoody's speech upon her promotion to 4-Star General.

One of the most controversial proxy-wars of the Cold War was the Vietnam War. Lasting from 1955 to 1975, the North Vietnamese fought the South Vietnamese with the USSR's and America's respective support. This collection includes 9...

In this activity, 2nd graders will identify shapes found around the room by recognizing their attributes such as number of angles, vertexes, and faces.

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.

The resources here, including cartoons, photographs, paintings, and posters, represent both events in order to compare them.

A guide to support parents as they work with their students with area, surface area, and volume problems.

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

Students may use this computer applet to explore angle sums of triangle, quadrilaterals, pentagons and hexagons.

Eight different polyhedra are given along with a challenge in this game. Can you arrange them so that their faces match in a chain? A solution is available to check your answers.

This site from ScienceWorld provides a short, informative description of many of the contributions of Pythagoras to mathematics. Links exist to some of the contributions as well as to additional information.