1. Properties of diagonals eq: What is the relationship between a polygon’s side and its diagonals. 11/23/09

2. Review: What is an angle? Acute angle? Obtuse angle? Right angle?

3. Review: Straight angle? What is a triangle? Equilateral? Scalene?

4. Review: Isosceles? Acute triangle? Obtuse triangle? Right triangle?

5. Review: Congruent? Line segment? Ray?

6. Look at last chart. How many diagonals were in a triangle from one vertex? In a quadrilateral? In a pentagon?

7. In a hexagon? In an octagon? What was the rule for finding how many diagonals could be drawn from 1 vertex?

8. Hand out polygon chart, polygons, rulers. Record length of sides (in cm) on chart

9. Draw diagonals from one corner. Record length of diagonals (in cm).

10. Conclusions: Diagonals/sides congruent Diagonals are longer Sides are longer

11. Share information

12. EQ: What is the relationship between a polygon’s side and its diagonals.