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| ==Concept #6 Chord== | | ==Concept #6 Chord== |
| [[File:chord001.jpg|200px|right]] | | [[File:chord001.jpg|200px|right]] |
− | '''DEFINITION:''' ''line joining any two points on the circumference''
| + | ===Learning objectives=== |
| + | # The students should understand that the chord is a line segment joining any two distinct points on the circle |
| + | # The students should understand that the longest chord in any circle is its diameter. |
| + | # Any number of chords can be drawn in a circle. |
| | | |
− | ===Learning objectives===
| |
− | *The students should understand that the chord is a line segment joining any two distinct points on the circle
| |
− | *The students should understand that the longest chord in any circle is its diameter.
| |
| ===Notes for teachers=== | | ===Notes for teachers=== |
− | *Explain the concept by drawing chords of different sizes.
| + | # Explain the concept by drawing chords of different sizes. |
− | *Make the students understand that the length of the chord increases as it moves closer to the centre and decreases as it moves away from the center.
| + | # Make the students understand that the length of the chord increases as it moves closer to the centre and decreases as it moves away from the center. |
| | | |
− | ===Activity No # 1=== | + | ===Activity No # Chord=== |
− | Fold the cut-circular paper at different points. Draw folded lines with different coloured pencils and observe the length of chords. | + | # Fold the cut-circular paper at different points. Draw folded lines with different coloured pencils and observe the length of chords. |
| {| style="height:10px; float:right; align:center;" | | {| style="height:10px; float:right; align:center;" |
| |<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;"> | | |<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;"> |
| ''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div> | | ''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div> |
| |} | | |} |
− | *'''Estimated Time :'''20 minutes. | + | *Estimated Time : 20 minutes. |
− | *'''Materials/ Resources needed''' | + | *Materials/ Resources needed :Circles cut from white paper, colour pencils, scale. |
− | Circles cut from white paper, colour pencils, scale. | + | *Prerequisites/Instructions, if any |
− | *'''Prerequisites/Instructions, if any''' | + | # The students should have the knowledge of circle, diameter, circumference and line segment. |
− | The students should have the knowledge of circle, diameter, circumference and line segment.<br> | + | Instructions to the teacher: |
− | '''Instructions to the teacher:'''
| |
| Instruct the children to get cut circles ready:<br> | | Instruct the children to get cut circles ready:<br> |
− | '''Instructions to the children:'''
| + | Instructions to the children: |
− | Fold the circle at different points and try to form the smallest and biggest chords. | + | # Fold the circle at different points and try to form the smallest and biggest chords. |
− | *'''Multimedia resources:'''Geogebra | + | *Multimedia resources: |
| *Website interactives/ links/ / Geogebra Applets | | *Website interactives/ links/ / Geogebra Applets |
− | *'''Process/ Developmental Questions''' | + | *Process/ Developmental Questions |
− | *'''Evaluation''' | + | *Evaluation: |
− | Observe to see if the children are able to fold and mark the chord accurately. | + | # Observe to see if the children are able to fold and mark the chord accurately. |
− | *'''Question Corner''' | + | *Question Corner: |
− | Name the chord that passes through the center of the circle.<br> | + | # Name the chord that passes through the center of the circle. |
− | What happens to the length of the chord as it moves away from the centre? | + | # What happens to the length of the chord as it moves away from the centre? |
| | | |
| ===Activity No # 2 The longest chord passes through the centre of the circle=== | | ===Activity No # 2 The longest chord passes through the centre of the circle=== |