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# 10 7 Polygons And Tessellations

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### 10 7 Polygons And Tessellations

1. 1. 10-7 Polygons and Tessellations Classify polygons and determine which polygons can form a tessellation.
2. 2. Sort the pictures into polygons and not polygons.
3. 3. T-table Not Polygons Polygons
4. 4. P i c t u r e # of s i d e s decagon nonagon Octagon Heptagon Hexagon Pentagon Name
5. 5. Regular Polygon—all sides and angles are congruent. <ul><li>Draw some examples of regular and non-regular polygons </li></ul>
6. 6. P 447 example 1 and 2
7. 7. Your turn a and b
8. 8. Angle measures
9. 9. Example 3
10. 10. Your turn c and d
11. 11. TESSELLATIONS <ul><li>A repetitive pattern of polygons that fit together with no overlaps or holes is called a tessellation. </li></ul><ul><li>http://library.thinkquest.org/16661/gather/gallery/index.html </li></ul><ul><li>Student creations: http://cte.jhu.edu/techacademy/web/2000/heal/tessellations.htm </li></ul>
12. 12. The sum of the measure of the angles where the vertices meet in a tessellation is 360 degrees. <ul><li>See top of page 448 </li></ul>
13. 13. Example 4
14. 14. 3-2-1 <ul><li>Picture of 3 polygons with names </li></ul><ul><li>2 definitions—regular and non-regular polygons </li></ul><ul><li>1 real world example of a tessellation </li></ul>
15. 15. Homework <ul><li>P 448: 4, 5, 8-18, 21-24 </li></ul>