# GEO: Regular-irregular polygons

### From OpenContent Curriculum

## Contents |

## **Current Standard**

Identify and classify regular and irregular polygons using diagonals, number of sides and angles; identify triangular and rectangular pyramids using vertices, edges, and faces. (GLE [7] G-1, G-2)

## **MODIFIED STANDARD:**

Feel free to edit the standard as you see fit. Use the discussion or Talk page to explain your reasons for changes.

## **STANDARD UNPACKED:**

**KNOW**
The vocabulary:

- vertex
- polygon vs. polyhedron (2D vs. 3D)
- triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, decagon
- regular vs. irregular polygon
- diagonals
- triangular and rectangular pyramids
- faces, edges and vertices on a polyhedron

**ABLE TO DO**

- classify a polygon according to the number of sides, angles or the number of diagonals it has
- identify if a polygon is regular or irregular

## **RESOURCES**

3-D Toolkit Student look at real life shapes and record them in their toolkit. Teacher sets up stations with examples of a shape at each station.

Polygon's defined and pictured

Polygon Matching Game: Pictures/Name

Science Vocabulary Hangman- Offers a stunning array of choices. Mathematical vocabulary areas include: 5th and 7th Grade Math, Geometry Basics, Numbers and Sets, and Really Big Numbers.