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From Karnataka Open Educational Resources
→Concept #6
Are the students standing on the circumference of the circle considered to be in the interior or in the exterior ? Justify.
Are the students standing on the circumference of the circle considered to be in the interior or in the exterior ? Justify.
==Concept #6==
==Concept #6 Chord==
===Learning objectives===
===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===
===Activity No # ===
*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.
===Activity No # 1===
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
*'''Estimated Time :'''20 minutes.
*Materials/ Resources needed
*'''Materials/ Resources needed'''
*Prerequisites/Instructions, if any
Circles cut from white paper, colour pencils, scale.
*Multimedia resources
*'''Prerequisites/Instructions, if any'''
The students should have the knowledge of circle, diameter, circumference and line segment.<br>
'''Instructions to the teacher:'''
Instruct the children to get cut circles ready:<br>
'''Instructions to the children:'''
Fold the circle at different points and try to form the smallest and biggest chords.
*'''Multimedia resources:'''Geogebra
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
*Process/ Developmental Questions
*'''Process/ Developmental Questions'''
*Evaluation
*'''Evaluation'''
*Question Corner
Observe to see if the children are able to fold and mark the chord accurately.
*'''Question Corner'''
Name the chord that passes through the center of the circle.<br>
What happens to the length of the chord as it moves away from the centre?
===Activity No # ===
===Activity No # ===
*Evaluation
*Evaluation
*Question Corner
*Question Corner
==Concept #7==
==Concept #7==
