Handout
Math Open Reference

Math Open Reference: Area of a Regular Polygon

For Students 9th - 10th
A complete reference guide to the area of a regular polygon. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Handout
Math Open Reference

Math Open Reference: Regular Polygon

For Students 9th - 10th
A complete reference guide to regular polygons. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 5.4 Constructions of Regular Polygons

For Students 9th - 10th Standards
Learn how to construct regular polygons.
Interactive
Calculator Soup

Calculator Soup: Regular Polygon Calculator

For Students 9th - 10th Standards
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.
eBook
Mathigon

Mathigon: Geometry: Polygons and Polyhedra: Platonic Solids

For Students 9th - 10th
A Platonic solid is a polyhedron made up of only one kind of regular polygon, that looks the same from every direction. (In other words, the same number of faces meet at every vertex.) There are only five different Platonic solids:...
Activity
Other

Visnos: Polygons

For Students 1st - 8th Standards
Create regular and irregular polygons and determine the angles and side lengths with this interactive exercise. Use Safari or Chrome browser.
Lesson Plan
OER Commons

Oer Commons: Area of a Circle

For Teachers 7th Standards
Seventh graders will compare the formula for the area of a regular polygon to discover the formula for the area of a circle.
Unit Plan
Wolfram Research

Wolfram Math World: Math World: Hexagon

For Students 9th - 10th Standards
Gives a detailed overview of hexagons, particularly of regular hexagons. Be sure to use the links for unfamiliar notation or variable representation. This site gives formulas for inner radius, circumradius, parameter, and area of a...
eBook
Mathigon

Mathigon: Geometry: Polygons and Polyhedra: Quadrilaterals

For Students 9th - 10th Standards
This lesson focuses on quadrilaterals which can fall into multiple categories based on the number of sides and the angles.
Handout
Math Open Reference

Math Open Reference: Equilateral Triangle

For Students 9th - 10th Standards
Learn about equilateral triangles with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Handout
Math Open Reference

Math Open Reference: Circumcircle

For Students 9th - 10th Standards
A handy reference guide to circumcircles. It provides definitions and examples that enhance further explanation. Includes links to related topics.

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