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From Karnataka Open Educational Resources
The longest chord passes through the centre of the circle (view source)
Revision as of 10:44, 3 December 2013
, 10:44, 3 December 2013→Concept #2.SECANT
*Question Corner
*Question Corner
==Concept #2.SECANT==
==Concept #2.Secant and Tangent==
===Learning objectives===
===Learning objectives===
# The secant is a line passing through a circle touching it at any two points on the circumference.
# 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.
===Notes for teachers===
===Notes for teachers===
===Activity No # ===
===Activity No # ===
''[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: 15 minutes
*Materials/ Resources needed
*Materials/ Resources needed: Laptop, geogebra file, projector and a pointer.
*Prerequisites/Instructions, if any
*Prerequisites/Instructions, if any:
*Multimedia resources
# 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 : Laptop and projector
*Website interactives/ links/ / Geogebra Applets
*Website interactives/ links/ / Geogebra Applets
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*Process/ Developmental Questions
*Process:
# 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:
# 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
*Evaluation
# What is the difference between the secant and a tangent?
# What is the difference between the chord and a secant ?
*Question Corner
*Question Corner
# Can you draw a secant touching 3 points on the circle ?
# At how many points does a tangent touch a circle ?
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