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From Karnataka Open Educational Resources
→Concept #1 CIRCLE CENTRE
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Identify the centre.+*Evaluation+#Where does the centre of the circle lie? (inside/outside)
−*Question Corner
−Is there a circle with 3/4/5 centres?
−
−===Activity No # 2 ===
−{| 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;">
−''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
−|}
−*Estimated Time
−*Materials/ Resources needed
−*Prerequisites/Instructions, if any
−*Multimedia resources
−*Website interactives/ links/ / Geogebra Applets
−*Process/ Developmental Questions
''The fixed point in the circle is called centre.''
''The fixed point in the circle is called centre.''
===Learning objectives===
===Learning objectives===
−#Define circle
+# The students should understand that centre is that fixed point in the circle from which all points are at equal distance.
−#give examples for circles
+# They should be able to give examples for circles
−#Locate centre for the given circle.
+# They should understand that a circle is drawn using centre as a reference point.
===Notes for teachers===
===Notes for teachers===
−Define circle and centre with the help of a diagram
+Define circle and centre with the help of a diagram.
===Activity No # 1 To locate centres for circles ===
===Activity No # 1 To locate centres for circles ===
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''[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
−20 minutes
*Materials/ Resources needed
*Materials/ Resources needed
For the teacher: chalk piece, geometry set.<br>
For the teacher: chalk piece, geometry set.<br>
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*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
*Process/ Developmental Questions
*Process/ Developmental Questions
−# How to mark the centre of a circle ?
−# How do you label it ?
−#How many centres does a circle has?<br>
+# How do you draw a circle ?
−*Evaluation
*Evaluation
+# How many centres does a circle have?<br>
+# Where does the centre of the circle lie? (inside/outside)
*Question Corner
*Question Corner
+# Can a circle be drawn without locating its centre ?
==Concept #2 Radius and Diameter==
==Concept #2 Radius and Diameter==
