Polygonspowerpoint
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![Page 1: Polygonspowerpoint](https://reader036.fdocuments.in/reader036/viewer/2022082805/54bf149b4a795953248b4577/html5/thumbnails/1.jpg)
What is a Polygon?What is a Polygon?
Dr. Beth McCulloch Vinson
Athens State University
PT3 Grant Funding, Summer 2000
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a many-sided figurea many-sided figure
a shape with three or a shape with three or more sides.more sides.
A polygon is…A polygon is…
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What do we need to know What do we need to know about polygons?about polygons?
How many sides does each polygon have?
Do all polygons look the same?
Can I know the name of a shape just by looking at it?
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TriangleTriangle A triangle has three sides.
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SquareSquare A square has four sides.
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PentagonPentagon A pentagon has five sides.
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Hexagon and HeptagonHexagon and Heptagon
A hexagon has six sides. (Hexagon and six both have an “x”.)
A heptagon has seven sides.
hexagon heptagon
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OctagonOctagon
An octagon has eight sides. Count the sides.
If this octagon was red and had the word “Stop” written on it, then you would know where we see a lot of octagons.
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Let’s Review:Let’s Review:
The triangle is the smallest polygon. It only has three sides.
A pentagon has five sides. A hexagon has six sides. A heptagon has seven sides. An octagon has eight sides.
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Match these.Match these.
Triangle eight sides
Heptagon three sides
Octagon seven sides
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Match some more.Match some more.
Pentagon four sides
Hexagon five sides
Square six sides
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A triangle is the smallest polygon because it has three sides. Can you have a two-sided polygon? Why or why not?
Two lines don’t close to make a shape. They make an angle.
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Key Question:Key Question:
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The ENDThe 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