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# 2.10 Polygon Diagonals

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### 2.10 Polygon Diagonals

1. 1. 11/18/09Polygon diagonals<br />EQ: How do you know if the polygon’s diagonals are parallel or perpendicular to it’s sides?<br />
2. 2. Review:<br />What is a side?<br />What is a line of symmetry?<br />What is a diagonal?<br />
3. 3. Review:<br />What is parallel?<br />What is perpendicular?<br />
4. 4. Review:<br />What is parallel?<br />What is perpendicular?<br />
5. 5. Review:<br />Draw a square.<br />Where are sides perpendicular?<br />Where are lines parallel?<br />
6. 6. Review:<br />Draw a parallelogram.<br />Where are sides perpendicular?<br />Where are lines parallel?<br />
7. 7. Review:<br />Draw a trapezoid.<br />Where are sides perpendicular?<br />Where are lines parallel?<br />
8. 8. Review:<br />Draw a regular pentagon.<br />Where are sides perpendicular?<br />Where are lines parallel?<br />
9. 9. Review:<br />Draw a regular pentagon.<br />Where are sides perpendicular?<br />Where are lines parallel?<br />
10. 10. Sort cards<br />Is the line drawn a diagonal<br />A line of symmetry<br />Or both?<br />
11. 11. Sort cards<br />Sort cards on Venn diagram<br />And glue down. <br />DO NOT Glue page into notebook (yet).<br />
12. 12. Make a chart<br />
13. 13. Make a chart <br />Use the figures on the Venn diagram.<br />Use the figures with a diagonal.<br />Check that circle.<br />
14. 14. Make a chart <br />What are the names of the figures with a diagonal?<br />Fill in the column 1 with these names<br />
15. 15. Make a chart <br />Rhombus<br />Regular pentagon<br />Hexagon<br />Square <br />
16. 16. Make a chart <br />Parallelogram<br />Rectangle<br />Pentagon <br />
17. 17. Make a chart <br />Now, which ones have diagonals that are perpendicular to sides?<br />Check that column<br />Use index card to help<br />
18. 18. Make a chart <br />Now, which ones have diagonals that are parallel to sides?<br />Check that column<br />Use index card to help<br />
19. 19. Make a chart <br />What did you discover?<br />EQ: How do you know if the polygon’s diagonals are parallel or perpendicular to it’s sides?<br />