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# Polygonspowerpoint

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What is a polygon?

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### Polygonspowerpoint

1. 1. What is a Polygon? Dr. Beth McCulloch Vinson Athens State University PT3 Grant Funding, Summer 2000
2. 2. a many-sided figure a shape with three or more sides. A polygon is…
3. 3. What do we need to know about polygons? <ul><li>How many sides does each polygon have? </li></ul><ul><li>Do all polygons look the same? </li></ul><ul><li>Can I know the name of a shape just by looking at it? </li></ul>
4. 4. Triangle <ul><li>A triangle has three sides. </li></ul>1 2 3
5. 5. Square <ul><li>A square has four sides. </li></ul>1 2 3 4
6. 6. Pentagon <ul><li>A pentagon has five sides. </li></ul>1 2 3 4 5
7. 7. Hexagon and Heptagon <ul><li>A hexagon has six sides. (Hexagon and six both have an “x”.) </li></ul><ul><li>A heptagon has seven sides. </li></ul>hexagon heptagon
8. 8. Octagon <ul><li>An octagon has eight sides. Count the sides. </li></ul>If this octagon was red and had the word “Stop” written on it, then you would know where we see a lot of octagons.
9. 9. Let’s Review: <ul><li>The triangle is the smallest polygon. It only has three sides. </li></ul><ul><li>A pentagon has five sides. </li></ul><ul><li>A hexagon has six sides. </li></ul><ul><li>A heptagon has seven sides. </li></ul><ul><li>An octagon has eight sides. </li></ul>
10. 10. Match these. <ul><li>Triangle eight sides </li></ul><ul><li>Heptagon three sides </li></ul><ul><li>Octagon seven sides </li></ul>
11. 11. Match some more. <ul><li>Pentagon four sides </li></ul><ul><li> </li></ul><ul><li>Hexagon five sides </li></ul><ul><li> </li></ul><ul><li>Square six sides </li></ul>
12. 12. <ul><li>A triangle is the smallest polygon because it has three sides. Can you have a two-sided polygon? Why or why not? </li></ul>Two lines don’t close to make a shape. They make an angle. 2 1 Key Question:
13. 13. The END A Project Developed for Preparing Tomorrow’s Teachers to Use Technology (PT3) By Dr. Beth McCulloch Vinson Athens State University, School of Education http://www.athens.edu/vinsobm
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