Difference between revisions of "Other Figures"
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> | + | *Reading labels: "trapezoid", "rhombus", "quatrefoil", "oval", "ellipse", "curvilinear triangle" or "Reuleaux triangle" |
+ | *Frame of the circle inset (for presentation of ellipse)<br> | ||
=== Preparation === | === Preparation === | ||
− | <br> | + | <br> |
=== Presentation === | === Presentation === | ||
− | <br> | + | #Isolate the trapezoid and identify it (trapezoid: Greek: trapezion - a little table). |
+ | #In order to understand why this figure has its name we must go back in time to see what a table of the Greeks looked like. | ||
+ | #Nowadays our tables don't look trapezoidal. | ||
+ | #Some Spanish tables have two legs but still not trapezoidal. | ||
+ | #The Greek table was like a Spanish table because it had two legs, yet it was more stable because the legs were inclined. | ||
+ | #Isolate the rhombus and identify it. | ||
+ | #This is a rhombus (rhombus: Greek: rhombos - magic wheel, top) | ||
+ | #In ancient Greece, in the city of Athens, during a religious procession through the streets, a priest walked along with a cane (rod) raised over his head. | ||
+ | #At the end of the cane there was a cord attached, and at the end of the cord there was a rhombus-shaped figure attached. | ||
+ | #He rotated the cane in the air as he walked causing this figure to spin around like a top, making a characteristic sound. | ||
+ | #This was part of a religious ritual. | ||
+ | #Isolate the quatrefoil and identify it (quatrefoil: Old French quatre - four, and foil - leaf). | ||
+ | #This figure has the shape of a four-leaf clover, considered a sign of good luck. | ||
+ | #Isolate the oval and identify it (oval: French ovale <Latin ovum> - egg). | ||
+ | #This figure has the shape of an egg. | ||
+ | #Isolate the ellipse and identify it (ellipse: Greek elleipsis - an omission or defect <elleipo - to leave out>). | ||
+ | #What has been left out? | ||
+ | #Think of the ideal figure, the circle. | ||
+ | #Place the inset of the ellipse in the circle frame and it is easy to what is missing. | ||
+ | #This is also the shape of the path that the earth follows around the sun. | ||
+ | #Isolate the Reuleaux triangle and identify it (curvilinear: Latin curvus - curved, and linear - a line). | ||
+ | #This triangle has three sides which are curved lines. | ||
+ | #It is named after a man name Reuleaux who discovered the properties of this shape. | ||
+ | #He found that a drill bit made in this shape will make square holes. | ||
+ | #Give three-period lesson and give the reading labels.<br> | ||
=== Control Of Error === | === Control Of Error === | ||
− | <br> | + | <br> |
=== Points Of Interest === | === Points Of Interest === | ||
− | <br> | + | <br> |
=== Purpose === | === Purpose === | ||
− | <br> | + | *Knowledge of the geometric figures and their relative exact nomenclature.<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 04:12, 31 July 2009
Contents
Age
6-9.
Materials
- Reading labels: "trapezoid", "rhombus", "quatrefoil", "oval", "ellipse", "curvilinear triangle" or "Reuleaux triangle"
- Frame of the circle inset (for presentation of ellipse)
Preparation
Presentation
- Isolate the trapezoid and identify it (trapezoid: Greek: trapezion - a little table).
- In order to understand why this figure has its name we must go back in time to see what a table of the Greeks looked like.
- Nowadays our tables don't look trapezoidal.
- Some Spanish tables have two legs but still not trapezoidal.
- The Greek table was like a Spanish table because it had two legs, yet it was more stable because the legs were inclined.
- Isolate the rhombus and identify it.
- This is a rhombus (rhombus: Greek: rhombos - magic wheel, top)
- In ancient Greece, in the city of Athens, during a religious procession through the streets, a priest walked along with a cane (rod) raised over his head.
- At the end of the cane there was a cord attached, and at the end of the cord there was a rhombus-shaped figure attached.
- He rotated the cane in the air as he walked causing this figure to spin around like a top, making a characteristic sound.
- This was part of a religious ritual.
- Isolate the quatrefoil and identify it (quatrefoil: Old French quatre - four, and foil - leaf).
- This figure has the shape of a four-leaf clover, considered a sign of good luck.
- Isolate the oval and identify it (oval: French ovale <Latin ovum> - egg).
- This figure has the shape of an egg.
- Isolate the ellipse and identify it (ellipse: Greek elleipsis - an omission or defect <elleipo - to leave out>).
- What has been left out?
- Think of the ideal figure, the circle.
- Place the inset of the ellipse in the circle frame and it is easy to what is missing.
- This is also the shape of the path that the earth follows around the sun.
- Isolate the Reuleaux triangle and identify it (curvilinear: Latin curvus - curved, and linear - a line).
- This triangle has three sides which are curved lines.
- It is named after a man name Reuleaux who discovered the properties of this shape.
- He found that a drill bit made in this shape will make square holes.
- Give three-period lesson and give the reading labels.
Control Of Error
Points Of Interest
Purpose
- Knowledge of the geometric figures and their relative exact nomenclature.
Variation
Links
Handouts/Attachments