University of Cambridge
University of Cambridge: Nrich: Diagonal Trace
Develop problem solving skills working with pentagons and then check your results.
University of Georgia
University of Georgia: Inter Math: Pentagon
This site gives the general definition of a pentagon with several diagramed examples. There are links to related terms, everyday examples, challenging problems, more information, and the interactive check point involving pentagons...
SMART Technologies
Smart: Polygons
This SMART Notebook lesson allows students to characteristics of polygons by exploring vocabulary and sample problems.
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.
Expansion Learning
Expansion Learning: Math Activity: What Shape Is This? (Part 2)
Activity provides students the practice they need to master the skill of identifying shapes. Immediate feedback is given.
Expansion Learning
Expansion Learning: Math Activity: Select the Shape (Part 2)
Activity provides students the practice they need to master the skill of identifying shapes. Immediate feedback is given.
Expansion Learning
Expansion Learning: Math Activity: Know Your Shapes (Part 2)
Activity provides students the practice they need to master the skill of identifying shapes. Immediate feedback is given.
Calculator Soup
Calculator Soup: Regular Polygon Calculator
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.
Geometry Help
Geometry Help: Pentagons and Hexagons
Explains the basic concept of pentagons and hexagons with step-by-step instructions and methods for solving specific problems on your own relating to this topic.
Curated OER
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.
Curated OER
Ic Teachers: Shapes Polygons
Introductory site on polygons, with exercises on the basic ones.
Curated OER
Wikipedia: National Historic Landmarks in Virginia: Pentagon
Building is symbolic of national military power.