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Line 63: − + − {| 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;"> − ''[http://karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div> − − *Estimated Time: 15 minutes − *Materials/ Resources needed: Laptop, geogebra file, projector and a pointer. − *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 : Laptop and projector − *Website interactives/ links/ / Geogebra Applets − This geogebra file has been made by ITfC-Edu-team − <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" /> − *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 − # What is the difference between the secant and a tangent? − # What is the difference between the chord and a secant ? − *Question Corner − # Can you draw a secant touching 3 points on the circle ? − # At how many points does a tangent touch a circle ? − # How many tangents can be drawn to a circle ? − # 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 ? − − ===Activity No # === − {| 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;"> − ''[http://karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div> − |} − *Estimated Time − *Materials/ Resources needed − *Prerequisites/Instructions, if any − *Multimedia resources − *Website interactives/ links/ / Geogebra Applets − *Process/ Developmental Questions − *Evaluation − *Question Corner
The longest chord passes through the centre of the circle (view source)
Revision as of 20:23, 9 July 2014
, 20:23, 9 July 2014→Concept #2.Secant and Tangent
# A tangent is a line toucing the circle at only one point 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 # 1.Understanding Secant and Tangent using geogebra. ===
===Activities===
#Activity #1 - [[Circles_and_lines_activity_3|Understanding secant and tangent using Geogebra]]
|}
==Concept # Construction of tangents==
==Concept # Construction of tangents==