What is a Polygon? Dr. Beth McCulloch Vinson Athens State University PT3 Grant Funding, Summer 2000
a many-sided figure a shape with three or more sides. A polygon is…
What do we need to know about polygons? <ul><li>How many sides does each polygon have?  </li></ul><ul><li>Do all polygons ...
Triangle <ul><li>A triangle has three sides. </li></ul>1 2 3
Square <ul><li>A square has four sides. </li></ul>1 2 3 4
Pentagon <ul><li>A pentagon has five sides. </li></ul>1 2 3 4 5
Hexagon and Heptagon <ul><li>A hexagon has six sides.  (Hexagon and six both have an “x”.) </li></ul><ul><li>A heptagon ha...
Octagon <ul><li>An octagon has eight sides.  Count the sides. </li></ul>If this octagon was red and had the word “Stop” wr...
Let’s Review: <ul><li>The triangle is the smallest polygon.  It only has three sides.  </li></ul><ul><li>A pentagon has fi...
Match these. <ul><li>Triangle  eight sides </li></ul><ul><li>Heptagon     three sides </li></ul><ul><li>Octagon seven side...
Match some more. <ul><li>Pentagon  four sides </li></ul><ul><li>  </li></ul><ul><li>Hexagon five sides </li></ul><ul><li> ...
<ul><li>A triangle is the smallest polygon because it has three sides.  Can you have a two-sided polygon?  Why or why not?...
The END A Project Developed for Preparing Tomorrow’s Teachers to Use Technology (PT3) By Dr. Beth McCulloch Vinson Athens ...
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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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