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From Karnataka Open Educational Resources
→Concept #6
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+
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 # ===
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*Evaluation
*Evaluation
*Question Corner
*Question Corner
−==Concept #7==
==Concept #7==
