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# 10 7 Polygons And Tessellations

## on Feb 17, 2009

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## 10 7 Polygons And TessellationsPresentation Transcript

• 10-7 Polygons and Tessellations Classify polygons and determine which polygons can form a tessellation.
• Sort the pictures into polygons and not polygons.
• T-table Not Polygons Polygons
• P i c t u r e # of s i d e s decagon nonagon Octagon Heptagon Hexagon Pentagon Name
• Regular Polygon—all sides and angles are congruent.
• Draw some examples of regular and non-regular polygons
• P 447 example 1 and 2
• Your turn a and b
• Angle measures
• Example 3
• Your turn c and d
• TESSELLATIONS
• A repetitive pattern of polygons that fit together with no overlaps or holes is called a tessellation.
• http://library.thinkquest.org/16661/gather/gallery/index.html
• Student creations: http://cte.jhu.edu/techacademy/web/2000/heal/tessellations.htm
• The sum of the measure of the angles where the vertices meet in a tessellation is 360 degrees.
• See top of page 448
• Example 4
• 3-2-1
• Picture of 3 polygons with names
• 2 definitions—regular and non-regular polygons
• 1 real world example of a tessellation
• Homework
• P 448: 4, 5, 8-18, 21-24