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From Karnataka Open Educational Resources
→Activity No #1 Size of circle of varying radius using Geogebra
`http://lasp.colorado.edu/~bagenal/MATH/images/math3fig/circle.gif`
`http://lasp.colorado.edu/~bagenal/MATH/images/math3fig/circle.gif`
===Activity No #1 Size of circle of varying radius using Geogebra ===
===Activity No #1 Circle of varying radius using Geogebra ===
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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>
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*Estimated Time
*Estimated Time: 20 mins
*Materials/ Resources needed
*Prerequisites/Instructions, if any
*Materials/ Resources needed: Laptop, geogebra,projector and a pointer
*Multimedia resources
*Prerequisites/Instructions, if any:
#The students should know a circle
#They should know the meaning of radius .
#They should know to measure radius using compass
#They should know to draw a circle of given radius using compass.
*Multimedia resources: Laptop
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
*Process/ Developmental Questions
*Evaluation
*Process/ Developmental Questions:
*Question Corner
#Review the terms plane closed figures, circle and radius.
#Show them how to measure radius on the compass
#Show them to draw a circle.
#Project the geogebra and let them view the changing size of the circle with changing radius.
# What is a circle ?
# Which point is the centre of the circle ?
# What is the radius of this circle ?
# How do you name the radius ?
*Evaluation:
#By what parameter is the size of a circle defined ?
#Bigger the radius, _____________ is the size of the circle.
*Question Corner:
# How do you name a circle ?
# Can you draw a circle without knowing the radius ?
===Activity No # ===
===Activity No # ===
