Number Of Tangents From A Point On A Circle
Chapter Name : Circles |
Sub Topic Code : 104_10_10_03_01 |
Topic Name : Number Of Tangents From A Point On A Circle |
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Sub Topic Name : Number Of Tangents From A Point On A Circle |
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Introduction
Depending on where the point is located, there can be one, two or zero tangents from the point on the circle.
Pre-Requisites:
Meaning of tangents, chord and secant
Activity:
The end of the forceps to your side acts as the point and the handles that reach to the bangle are tangents.
Real Life Question:
Example of a real life object with a point on the circle?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Circle | A collection of points in a plane from a common center and distance. |
| Secant | A line intersecting a circle at 2 points. |
| Tangent | A line that intersects the circle at one point. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Forceps and a bangle | Hold the bangle using the forceps. |
Real life uses :
In geometrical applications.
Practical examples around us
| Examples | Explainations |
|---|---|
| Wheel | The wheel makes contact with the ground in one point. The surface acts as the tangent running through that point. |
What you learn in Theory:
Number of tangents from a point on a circle.
What you learn in Practice:
There are 3 possibilities of circles and number of tangents from a given point.