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Line 355:
Line 355: − '''DEFINITION:'''Circles with same centre and different radii + − + − + − + − + + − + − + − + + + + +
→Concept #8 concentric circles
==Concept #8 concentric circles==
==Concept #8 concentric circles==
[[File:conc_circles.jpg|200px|right]]
[[File:conc_circles.jpg|200px|right]]
===Learning objectives===
===Learning objectives===
# The students learn that concentric circles are circles with same centre but different radii.
===Notes for teachers===
===Notes for teachers===
===Activity No # ===
===Activity No # Drawing concentric circles===
{| 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: 15 minutes
*Materials/ Resources needed
*Materials/ Resources needed: White paper, compass, pencil, colour pencils, scale
*Prerequisites/Instructions, if any
*Prerequisites/Instructions, if any:
# The students should have the skill of drawing circles accurately for given radius.
*Multimedia resources
*Multimedia resources
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
*Process/ Developmental Questions
*Process/ Developmental Questions:
*Evaluation
# What is the centre for differrent circles.
*Question Corner
*Evaluation:
# Are the students able to understand that the centre is same for concentric circles.
*Question Corner:
# What are equal circles (congruent)?
# What determines the size of the circle ?
===Activity No # ===
===Activity No # ===