Difference between revisions of "Plane Figures: Exercise: Find Divergent Lines in the Environment"

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(Removed reference to preceding presentation.)
 
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=== Presentation  ===
 
=== Presentation  ===
  
#Position one stick horizontally on the board.
+
#Position one stick horizontally on the board.  
#As in the preceding presentation use two different guide sticks to position the second stick.  
+
#Use two different guide sticks to position the second stick.  
#Fix the second stick and set the guide sticks aside.
+
#Fix the second stick and set the guide sticks aside.  
 
#Place the two happy children at the wide end.  
 
#Place the two happy children at the wide end.  
#As these two go along, they become closer and closer and happier and happier, knowing that in the end they will meet.
+
#As these two go along, they become closer and closer and happier and happier, knowing that in the end they will meet.  
 
#Replace the figures with one-way arrows.  
 
#Replace the figures with one-way arrows.  
 
#These lines go only in one direction - toward each other.  
 
#These lines go only in one direction - toward each other.  
#These are convergent lines. (convergent: Latin con- together, and vergera - to incline)
+
#These are convergent lines. (convergent: Latin con- together, and vergera - to incline)  
#These lines come from two different points toward each other to one point.
+
#These lines come from two different points toward each other to one point.  
 
#Love stories in geometry, like those in real life can change.  
 
#Love stories in geometry, like those in real life can change.  
 
#Place extra sticks at the narrow end to see how these line continue in their one direction.  
 
#Place extra sticks at the narrow end to see how these line continue in their one direction.  

Latest revision as of 03:59, 4 January 2010

Age

6-9.

Materials


Preparation


Presentation

  1. Position one stick horizontally on the board.
  2. Use two different guide sticks to position the second stick.
  3. Fix the second stick and set the guide sticks aside.
  4. Place the two happy children at the wide end.
  5. As these two go along, they become closer and closer and happier and happier, knowing that in the end they will meet.
  6. Replace the figures with one-way arrows.
  7. These lines go only in one direction - toward each other.
  8. These are convergent lines. (convergent: Latin con- together, and vergera - to incline)
  9. These lines come from two different points toward each other to one point.
  10. Love stories in geometry, like those in real life can change.
  11. Place extra sticks at the narrow end to see how these line continue in their one direction.
  12. What happens? After the point of convergency, these two lines become divergent.

Control Of Error


Points Of Interest


Purpose


Variation

Find convergent lines in the environment.

Links


Handouts/Attachments