Basic Constructions
Chapter Name : Constructions |
Sub Topic Code : 104_09_11_02_01 |
Topic Name : Basic Constructions |
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Sub Topic Name : Basic Constructions |
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Introduction
All of you know how to draw angles using a protractor. But what if you have to bisect them too? In these slides we will learn how to bisect any angle, any line (perpendicularly) and how to draw 60o without using a protractor.
Pre-Requisites:
Circle, Line, Point, Arc, Radius, Construction of a circle and line.
Real Life Question:
Can we draw angles even without using protractors?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Arc | A part of circle. |
| Radius | Distance between center and any point on the circumference of the circle. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|
Places to visit :
Visit the any hospital to see doctors ‘+’ sign.
Practical examples around us
| Examples | Explainations |
|---|---|
| Red Cross symbol | It is an example of perpendicular bisectors. In the symbol both the arms are each other’s perpendicular bisectors. |
What you learn in Theory:
How to bisect an angle? How to draw perpendicular bisector to a line? How to draw 60o without using compass?