Unit Plan
Math Is Fun

Math Is Fun: Properties of Regular Polygons

For Students 3rd - 8th
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.
Activity
Texas Instruments

Texas Instruments: Finding the Area of Regular Polygons

For Teachers 9th - 10th Standards
Students discover a very intuitive method for determining the area of a regular polygon. They use that information to develop the standard area formula.
Activity
Texas Instruments

Texas Instruments: Areas of Regular Polygons and Circles

For Teachers 9th - 10th Standards
Use Cabri Jr. to find the area of several regular polygons and then use that investigation to derive the area of a circle from a many-sided polygon.
Activity
Texas Instruments

Texas Instruments: Area of a Regular Polygon

For Teachers 9th - 10th
This activity has the students derive the formula for finding the area of a regular polygon. Demonstrating the procedure of constructing a regular polygon in front of the class maybe necessary depending on the students prior experience
Activity
Texas Instruments

Texas Instruments: Figuring Areas

For Teachers 9th - 10th
In this activity, students find the area of regular polygons using a summation approach and compare the summations with area calculated by Cabri Geometry Application. They also examine patterns of finding area and perimeter as the number...
Activity
Texas Instruments

Texas Instruments: Finding the Area of a Perfect Polygon.

For Teachers 9th - 10th
Students will review how to find the area of a regular polygon.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Polygons and Areas of Plane Figures

For Students 9th - 10th Standards
Twenty-five problems cover the topics of polygons and finding the area for various plane figures. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View...
Activity
Analyze Math

Analyze Math: Polygons Problems

For Students 9th - 10th Standards
Here are four problems about the area of a regular polygon. Start by finding the area of a hexagon inscribed in a circle of radius 10, and end by proving that as the number of sides of the polygon increases, the area of the polygon...
Activity
National Council of Teachers of Mathematics

The Math Forum: Seventh Grade Math: Area and Perimeter

For Students 6th - 8th
Learn how to enlarge drawings, figure out how much tile to buy to cover a specific floor, and learn about area and perimeter. These and other lesson plans are provided, including a fun interdisciplinary plan featuring dragons.
Activity
National Council of Teachers of Mathematics

The Math Forum: Find the Area of the Shape!

For Students 3rd - 8th Standards
Try to figure out the area of this challenging shape. In order to view the images, you will need to use JavaSketchpad.
PPT
Sophia Learning

Sophia: Using Right Triangle Trigonometry to Find the Area of Regular Polygons

For Students 9th - 10th Standards
This lesson will demonstrate how to use right triangle trigonometry and special right triangles (45-45-90 and 30-60-90) to find the area of triangles given the side lengths of the polygon. It is 2 of 4 in the series titled "Using Right...
Unit Plan
Sophia Learning

Sophia: Using Right Triangle Trigonometry to Find the Area of Regular Polygons

For Students 9th - 10th Standards
This lesson will demonstrate how to use right triangle trigonometry and special right triangles (45-45-90 and 30-60-90) to find the area of triangles given the side lengths of the polygon. It is 4 of 4 in the series titled "Using Right...