Difference between revisions of "Concepts in Action: Sensorial demonstration of the difference between H1 and H2"
From wikisori
(New page: === Age === <br> === Materials === <br> === Preparation === <br> === Presentation === <br> === Control Of Error === <br> === Points Of Interest === <br> === Purpose...) |
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Line 1: | Line 1: | ||
=== Age === | === Age === | ||
− | <br> | + | 6-9.<br> |
=== Materials === | === Materials === | ||
− | <br> | + | *Triangle fraction insets: whole, 3/3 |
+ | *Constructive triangles: H1, H2 and two red T3<br> | ||
=== Preparation === | === Preparation === | ||
− | <br> | + | <br> |
=== Presentation === | === Presentation === | ||
− | <br> | + | #Verify the congruency between the triangle whole inset and the small red equilateral triangle, by superimposing the inset on the wooden triangle. |
+ | #In the same way, we can see that this metal inset is equal to 1/6 of the grey trapezoid. | ||
+ | #Superimpose H2 on H1 so that the vertices of the grey hexagon coincide with the midpoints of the sides of the yellow hexagon. | ||
+ | #Place the 1/3 metal inset pieces over the yellow portion that remains visible. | ||
+ | #With this material we can cover only three places. | ||
+ | #However these three obtuse-angled triangles equal one small red equilateral triangle. | ||
+ | #Move the three thirds to the three remaining vacant spots; these three triangles correspond to the second small red equilateral triangle.<br> | ||
=== Control Of Error === | === Control Of Error === | ||
− | <br> | + | <br> |
=== Points Of Interest === | === Points Of Interest === | ||
− | <br> | + | <br> |
=== Purpose === | === Purpose === | ||
− | <br> | + | <br> |
=== Variation === | === Variation === | ||
− | <br> | + | <br> |
=== Links === | === Links === | ||
− | <br> | + | <br> |
=== Handouts/Attachments === | === Handouts/Attachments === | ||
− | <br> | + | <br> |
− | [[Category:Mathematics]] | + | [[Category:Mathematics]] [[Category:Mathematics_6-9]] |
Latest revision as of 05:27, 11 August 2009
Contents
Age
6-9.
Materials
- Triangle fraction insets: whole, 3/3
- Constructive triangles: H1, H2 and two red T3
Preparation
Presentation
- Verify the congruency between the triangle whole inset and the small red equilateral triangle, by superimposing the inset on the wooden triangle.
- In the same way, we can see that this metal inset is equal to 1/6 of the grey trapezoid.
- Superimpose H2 on H1 so that the vertices of the grey hexagon coincide with the midpoints of the sides of the yellow hexagon.
- Place the 1/3 metal inset pieces over the yellow portion that remains visible.
- With this material we can cover only three places.
- However these three obtuse-angled triangles equal one small red equilateral triangle.
- Move the three thirds to the three remaining vacant spots; these three triangles correspond to the second small red equilateral triangle.
Control Of Error
Points Of Interest
Purpose
Variation
Links
Handouts/Attachments