Difference between revisions of "Plane Figures: Exercise: Find Divergent Lines in the Environment"
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=== Presentation === | === Presentation === | ||
− | #Position one stick horizontally on the board. | + | #Position one stick horizontally on the board. |
− | # | + | #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
Contents
Age
6-9.
Materials
Preparation
Presentation
- Position one stick horizontally on the board.
- Use two different guide sticks to position the second stick.
- Fix the second stick and set the guide sticks aside.
- 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.
- Replace the figures with one-way arrows.
- These lines go only in one direction - toward each other.
- 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.
- 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.
- 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