Lesson Plan
Curated OER

Around The Stop Sign

For Teachers 6th - 12th
Students analyze a drawing of a regular octagon inscribed in a circle to determine angle measures, using knowledge of properties of regular polygons and the sums of angles in various polygons to help solve the problem. They use...
Unit Plan
Cuemath

Cuemath: Regular Polygon

For Students 9th - 10th Standards
Introduces the concept of regular polygons along with regular polygon examples, not regular polygons, irregular polygons, and area of a regular polygon. Check-out the solved examples for better understanding and try your hand at solving...
Unit Plan
Wolfram Research

Wolfram Math World: Octagon

For Students 9th - 10th
A complex look at the octagon, which is an eight-sided polygon, from Mathworld.com.
Handout
Math Open Reference

Math Open Reference: Octagon (8 Gon)

For Students 9th - 10th
A complete reference guide to octagons. It provides a definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Handout
University of Georgia

University of Georgia: Inter Math: Octagon

For Students 9th - 10th
This site gives the general definition of a octagon with examples of regular convex and irregular concave octagons. The site has links to related terms, everyday examples, challenging problems, more information, and the interactive check...
Graphic
Curated OER

Octagon1

For Students 9th - 10th
A complex look at the octagon, which is an eight-sided polygon, from Mathworld.com.