Curated OER
Pick's Theorem
In this Pick's Theorem worksheet, students solve and graph 6 different problems that include using Pick's Theorem to solve. First, they use Pick's Theorem to determine the area of the shapes given as well as their own shapes drawn. Then,...
Curated OER
Powerful Polygons
Students scan the classroom to find different common shapes. They listen as the teacher defines polygon and regular polygon. The teacher demonstrates regular polygons via the Internet and the "Math is Fun" web site. Students go outside...
Curated OER
Area of irregular Polygons: Historical Motivator - Lewis and Clark Adventure
Seventh graders find the area of irregular polygons. For this lesson on calculating area, 7th graders use the adventures of Lewis and Clark as motivation to learn how to calculate the area of irregular polygons.
CK-12 Foundation
Ck 12: Regular and Irregular Polygons
[Free Registration/Login Required] Students explore the concept of regular and irregular polygons by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn...
Math Open Reference
Math Open Reference: Polygons
Get the definition and properties of a polygon. Then explore such topics as: 1) types of polygon 2) area 3) Perimeter 4) angles associated with polygons and 5) names of polygons.
CK-12 Foundation
Ck 12: Geometry: Regular and Irregular Polygons
[Free Registration/Login may be required to access all resource tools.] Identify regular polygons and their characteristics
Math Is Fun
Math Is Fun: Properties of Regular Polygons
Find a definition of regular polygon, and learn how to calculate the internal angle, external angle, and number of diagonals of a regular polygon. Also, learn how to find the area of regular polygons.
CK-12 Foundation
Ck 12: Geometry: Polygon Classification
[Free Registration/Login may be required to access all resource tools.] Identifying polygons, their diagonals and their angles
CK-12 Foundation
Ck 12: Geometry: Regular and Irregular Polygons
[Free Registration/Login may be required to access all resource tools.] Understand the difference between regular and irregular polygons.
Math Open Reference
Math Open Reference: Interior Angles of a Polygon
Learn about interior angles of a polygon with this handy reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
The Math League
The Math League: Figures and Polygons
This website has basic definitions for most polygons, regular and irregular.
The Math League
The Math League: Figures and Polygons: Nonagons
This site provides definitions and examples of the various types of polygons including nonagons.
ClassFlow
Class Flow: Area
[Free Registration/Login Required] This flipchart teaches students how to find the area of an irregular polygon.
Math Is Fun
Math Is Fun: Area of Irregular Polygons
Learn how to use coordinates to calculate the area of an irregular polygon.
SMART Technologies
Smart: Polygons
This SMART Notebook lesson allows students to characteristics of polygons by exploring vocabulary and sample problems.
Math Open Reference
Math Open Reference: Circumcircle
A handy reference guide to circumcircles. It provides definitions and examples that enhance further explanation. Includes links to related topics.