Difference between revisions of "Secant and tangent of a circle"
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m (Preeta moved page Circles and lines activity 3 to Secant and tangent of a circle without leaving a redirect) |
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| − | + | ===Objectives=== | |
| − | = | + | #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. | ||
| − | = | + | ===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 ? | ||
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# 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__ | |
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Revision as of 14:59, 7 May 2019
Objectives
- 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.
Materials/ Resources needed
Laptop, geogebra file, projector and a pointer.
This geogebra file has been made by ITfC-Edu-team
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 chord and a secant ?
- 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 ?