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Line 1: − __FORCETOC__+ − + + + + + + + + − + − 40 minutes − − ==Prerequisites/Instructions, if any== − # The students should have a prior knowledge about a circle and its basic parts and terms. − # They should know the clear distinction between radius, diameter, chord, secant and tangent. − ==Multimedia resources== − ==Website interactives/ links/ simulations/Geogebra applets==+ − <ggb_applet width="1280" height="600" version="4.0" 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enableRightClick="false" showAlgebraInput="false" enableShiftDragZoom="true" showMenuBar="false" showToolBar="false" showToolBarHelp="true" enableLabelDrags="false" showResetIcon="true" />+ − + − # The teacher can show the geogebra file.+ − # Move the points on circumference and explain secant.+ − # When both endpoints of secant meet, it becomes a tangent.+ − ==Developmental Questions (What discussion questions)==+ − # Name the points on the circumference of the circle.+ − # At how many points is the line touching the circle ?+ − # What is the line called ?+ − ==Evaluation (Questions for assessment of the child)==+ − + − ==Question Corner== Line 30:
Line 30: − + − ==Activity Keywords== − #Geogebra − #Secant − #Tangent − − [http://karnatakaeducation.org.in/KOER/en/index.php/Circles_and_lines Back]
no edit summary
===Objectives===
=Activity - Understanding secant and tangent using Geogebra=
#The secant is a line passing through a circle touching it at any two points on the circumference.
#A tangent is a line toucing the circle at only one point on the circumference.
===Estimated Time===
40 minutes
===Prerequisites/Instructions, prior preparations, if any===
* The students should have a prior knowledge about a circle and its basic parts and terms.
* They should know the clear distinction between radius, diameter, chord, secant and tangent.
==Estimated Time==
===Materials/ Resources needed===
==Materials/ Resources needed==
Laptop, geogebra file, projector and a pointer.
Laptop, geogebra file, projector and a pointer.
This geogebra file has been made by ITfC-Edu-team
This geogebra file has been made by ITfC-Edu-team
==Process (How to do the activity)==
===Process (How to do the activity)===
* The teacher can show the geogebra file.
* Move the points on circumference and explain secant.
* When both endpoints of secant meet, it becomes a tangent.
* Name the points on the circumference of the circle.
* At how many points is the line touching the circle ?
* What is the line called ?
* '''Evaluation Questions'''
# What is the difference between the secant and a tangent?
# What is the difference between the secant and a tangent?
# What is the difference between the chord and a secant ?
# What is the difference between the chord and a secant ?
# Can you draw a secant touching 3 points on the circle ?
# Can you draw a secant touching 3 points on the circle ?
# At how many points does a tangent touch a circle ?
# At how many points does a tangent touch a circle ?
# How many tangents can be drawn to a circle at any one given point ?
# How many tangents can be drawn to a circle at any one given point ?
# How many parallel tangents can a circle have at the most ?
# How many parallel tangents can a circle have at the most ?
__FORCETOC__