Changes
From Karnataka Open Educational Resources
222 bytes added
, 06:28, 21 May 2019
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| + | The transverse common tangents also meet on the line of centres and divide it internally in the ratio of the radii. |
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| ===Objectives=== | | ===Objectives=== |
| + | To construct transverse common tangents for the given circles. |
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| ===Estimated Time=== | | ===Estimated Time=== |
| 45 minutes | | 45 minutes |
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| # If the same straight line is a tangent to two or more circles, then it is called a common tangent. | | # If the same straight line is a tangent to two or more circles, then it is called a common tangent. |
| # If the centres of the circles lie on opposite side of the common tangent, then the tangent is called a transverse common tangent. | | # If the centres of the circles lie on opposite side of the common tangent, then the tangent is called a transverse common tangent. |
− | # Note: In general,
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− | *The two circles are named as C1 and C2
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− | * The distance between the centre of two circles is 'd'
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− | * Radius of one circle is taken as 'R' and other as 'r'
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− | * The length of tangent is 't'
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| ===Materials/ Resources needed=== | | ===Materials/ Resources needed=== |
− | * Laptop, geogebra file, projector and a pointer. | + | * Digital: Laptop, geogebra file, projector and a pointer. |
− | * Students' individual construction materials. | + | * Non Digital: Students' individual construction materials. |
| + | * Gegebra file: |
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| ===Process (How to do the activity)=== | | ===Process (How to do the activity)=== |
| + | Note: In general, |
| + | # The two circles are named as C1 and C2 |
| + | # The distance between the centre of two circles is 'd' |
| + | # Radius of one circle is taken as 'R' and other as 'r' |
| + | # The length of tangent is 't' |
| + | |
| 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. |
| * __FORCETOC__ Developmental Questions (What discussion questions) | | * __FORCETOC__ Developmental Questions (What discussion questions) |