Difference between revisions of "Presentation of the Materials: Triangles"
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> | + | *Insets of the fractional parts of a triangle |
| + | *Geometry charts... triangle 1,2,3,4<br> | ||
=== Preparation === | === Preparation === | ||
| − | <br> | + | <br> |
=== Presentation === | === Presentation === | ||
| − | <br> | + | #Bring out the four insets. |
| + | #Identify the whole triangle: equilateral, whole, unit. | ||
| + | #Identify the others in the same way as before: the number of equal parts, how they were formed, the value of each resulting piece. | ||
| + | #The same triangle was divided into two equal parts by the height. | ||
| + | #Each has the value of 1/2. | ||
| + | #The same triangle was divided into three equal parts by the angle bisectors extending to the point of intersection. | ||
| + | #Each has the value of 1/3. | ||
| + | #The same triangle was divided into four equal parts by finding the midpoints of the sides and joining them. | ||
| + | #Each has the value of 1/4. | ||
| + | #Classify the triangles which have been formed: 1/2 - right-angled scalene triangle; 1/3 - obtuse-angled isosceles triangle; 1/4 - equilateral triangle. show chart 1. | ||
| + | #Examine the relationship between the lines of the fractional triangles and the whole. | ||
| + | #Show charts 2,3 and 4.<br> | ||
=== Control Of Error === | === Control Of Error === | ||
| − | <br> | + | <br> |
=== Points Of Interest === | === Points Of Interest === | ||
| − | <br> | + | <br> |
=== Purpose === | === Purpose === | ||
| − | <br> | + | <br> |
=== Variation === | === Variation === | ||
| − | <br> | + | The child may construct his own charts.<br> |
=== Links === | === Links === | ||
| − | <br> | + | <br> |
=== Handouts/Attachments === | === Handouts/Attachments === | ||
| − | <br> | + | <br> |
| − | [[Category:Mathematics]] | + | [[Category:Mathematics]] [[Category:Mathematics_6-9]] |
Latest revision as of 04:59, 11 August 2009
Contents
Age
6-9.
Materials
- Insets of the fractional parts of a triangle
- Geometry charts... triangle 1,2,3,4
Preparation
Presentation
- Bring out the four insets.
- Identify the whole triangle: equilateral, whole, unit.
- Identify the others in the same way as before: the number of equal parts, how they were formed, the value of each resulting piece.
- The same triangle was divided into two equal parts by the height.
- Each has the value of 1/2.
- The same triangle was divided into three equal parts by the angle bisectors extending to the point of intersection.
- Each has the value of 1/3.
- The same triangle was divided into four equal parts by finding the midpoints of the sides and joining them.
- Each has the value of 1/4.
- Classify the triangles which have been formed: 1/2 - right-angled scalene triangle; 1/3 - obtuse-angled isosceles triangle; 1/4 - equilateral triangle. show chart 1.
- Examine the relationship between the lines of the fractional triangles and the whole.
- Show charts 2,3 and 4.
Control Of Error
Points Of Interest
Purpose
Variation
The child may construct his own charts.
Links
Handouts/Attachments
