To determine if three line segments can form a triangle, the document discusses reviewing problem solving techniques for finding missing angles in triangles and quadrilaterals. Students are instructed to create a bubble map of known triangle properties and a four column chart. Using cut straws of different lengths, students will try to form triangles in 10 ways and record their results. They will then add any new discoveries to the bubble map and complete an activity on determining if three line segments make a triangle or quadrilateral.

1. Does it make a triangle?11/17/09 EQ: How do I know if 3 line segments will make a triangle?

2. Review: How do I find the missing angle in a triangle?

3. Review: How do I find the missing angle in a quadrilateral?

4. Review: Go over problem solving cards.

5. Review: Scalene Triangle: Isosceles Triangle: Equilateral Triangle:

6. Review: Make a bubble map for what we already know about triangles.

7. Make a chart 4 columns

8. Use some straws cut in different lengths to make triangles. Use the straws in 10 different ways to fill in chart.

9. Hand out straws and rulers. Everyone has a pack. Work on own. Fill in chart.

10. What did you discover? Add more to bubble map. Complete Does it make a Triangle.

11. EQ: How do I know if 3 line segments will make a triangle?

12. Assignment: Does it make a triangle or quadrilateral?