| Line 1: |
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| − | __FORCETOC__
| + | ===Objectives=== |
| − | =Activity No # 1 - Transverse Common Tangent= | + | ===Estimated Time=== |
| | + | 45 minutes |
| | | | |
| − | ==Estimated Time== | + | ===Prerequisites/Instructions, prior preparations, if any=== |
| − | 45 minutes
| |
| − | ==Materials/ Resources needed==
| |
| − | # Laptop, geogebra file, projector and a pointer.
| |
| − | # Students' individual construction materials.
| |
| − | ==Prerequisites/Instructions, if any== | |
| | # The students should have prior knowledge of a circle , tangent and direct and transverse common tangents . | | # The students should have prior knowledge of a circle , tangent and direct and transverse common tangents . |
| | # They should understand that a tangent is always perpendicular to the radius of the circle. | | # They should understand that a tangent is always perpendicular to the radius of the circle. |
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| | * Radius of one circle is taken as 'R' and other as 'r' | | * Radius of one circle is taken as 'R' and other as 'r' |
| | * The length of tangent is 't' | | * The length of tangent is 't' |
| − | ==Multimedia resources== | + | ===Materials/ Resources needed=== |
| − | Laptop | + | * Laptop, geogebra file, projector and a pointer. |
| − | ==Website interactives/ links/ simulations/ Geogebra Applets==
| + | * Students' individual construction materials. |
| − | <ggb_applet width="1280" height="600" version="4.0" 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| − | ==Process (How to do the activity)== | + | ===Process (How to do the activity)=== |
| − | # The teacher can explain the step by step construction of Transverse common tangent.
| + | The teacher can explain the step by step construction of Transverse common tangent. |
| − | ==Developmental Questions (What discussion questions)==
| + | * __FORCETOC__ Developmental Questions (What discussion questions) |
| | # What is a transverse common tangent ? | | # What is a transverse common tangent ? |
| | # What is the radius of the third circle ? | | # What is the radius of the third circle ? |
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| | # Name the transverse common tangents . | | # Name the transverse common tangents . |
| | # At what points is the tangent touching the circles ? | | # At what points is the tangent touching the circles ? |
| − | ==Evaluation (Questions for assessment of the child)==
| + | * Evaluation (Questions for assessment of the child) |
| | # Is the student able to comprehend the sequence of steps in constructing the tangent. | | # Is the student able to comprehend the sequence of steps in constructing the tangent. |
| | # Is the student able to identify error areas while constructing ? | | # Is the student able to identify error areas while constructing ? |
| | # Is the student observing that the angle between the tangent and radius at the point of intersection is 90º ? | | # Is the student observing that the angle between the tangent and radius at the point of intersection is 90º ? |
| | # Is the student able to understand the difference in the construction protocol between direct common tangent and transverse common tangent ? | | # Is the student able to understand the difference in the construction protocol between direct common tangent and transverse common tangent ? |
| − | ==Question Corner==
| + | * Question Corner |
| | # What is the formula to find the length of transverse common tangent ? | | # What is the formula to find the length of transverse common tangent ? |
| | # Can a direct common tangent be drawn to two circles one inside the other ? | | # Can a direct common tangent be drawn to two circles one inside the other ? |
| | # What are properties of transverse common tangents ? | | # What are properties of transverse common tangents ? |
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| − | ==Activity Keywords==
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| − | #Geogebra
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| − | #Transverse common tangent
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| − | [http://karnatakaeducation.org.in/KOER/en/index.php/Circles_and_lines Back]
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