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Construction Of Tangent To A Circle
Chapter Name : Constructions
Sub Topic Code : 104_10_11_03_01
Topic Name : Construction Of Tangent To A Circle
Sub Topic Name : Construction Of Tangent To A Circle
Introduction

Using constructions we can make tangents to a circle from a point outside it.

Pre-Requisites:

Lines and angles, circles, tangents

Activity:

Observe how bending one end of the wire to make it touch its other end, divides it into half.

Real Life Question:

Where can you find a circle with both tangents from a point outside the circle?

Key Words / FlashCards
Key Words Definitions (pref. in our own words)
Compass A tool which helps in making circles and angles.
Line segment A line of definite length.
Bisector A line that divides another angle or line.
Learning aids / Gadgets
Gadgets How it can be used
Wire Keeping the wire taut acts as a line segment and it can be cut into smaller pieces.
Real life uses :

In engineering applications.

Practical examples around us
Examples Explainations
Cycle pedal chains Chains extend to the circle making tangents at the common points.
What you learn in Theory:

Steps of construction to make tangents to a circle.

What you learn in Practice:

How to draw tangents from a point outside a circle using constructions.

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