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→Concept #9 Congruent circles
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===Notes for teachers===
===Notes for teachers===
−===Activity No # 1===
+===Activity No # Cutting congruent circles without using compass===
{| 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: 10 minutes
+*Estimated Time: 3 minutes for video and 30 minutes to actually cut.
−*Materials/ Resources needed : Laptop, video link.
+*Materials/ Resources needed :
+# Laptop, video link.
+# Cardboard, a stick, nails, scale, pencil.
*Prerequisites/Instructions, if any
*Prerequisites/Instructions, if any
+# The students should know what are congruent circles.
*Multimedia resources
*Multimedia resources
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
{{#Widget:YouTube|id=XWH3ysrfrjM}}
{{#Widget:YouTube|id=XWH3ysrfrjM}}
*Process/ Developmental Questions:
*Process/ Developmental Questions:
−#Ask the students to watch the youtube clip
+# Ask the students to watch the youtube clip
−#Was the compass used here?
+# Was the compass used here?
−#what types of circles did he cut?
+# What types of circles did he cut?
+# What type of stick can be used ? (straight)
+# How many nails are fixed to the stick and for what purpose ?
+# What does the fixed nail depict ?
+# What is the trace made by moving line called ?
*Evaluation
*Evaluation
# Were the students able to conclude that there are alternatives for compass?
# Were the students able to conclude that there are alternatives for compass?
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*Question Corner
*Question Corner
+# Find out which methods are used while drawing circles in rangoli designs ?
===Activity No # ===
===Activity No # ===