Introduction
Chapter Name : Understanding Quadrilateral |
Sub Topic Code : 104_08_03_01_01 |
Topic Name : Introduction |
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Sub Topic Name : Introduction |
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Introduction
Kites have four sides and so does a slate. Any plane area having four sides is called a Quadrilateral. Quad means four; thus a four sided plane is quadrilateral.
Pre-Requisites:
Basic knowledge about lines
Activity:
How the plane surfaces are obtained; Simple open and simple closed curves can be obtained by cutting through edges. By overlapping, we can form non-simple open and closed curves.
Real Life Question:
What is the shape of a kite? Do slates and kites have anything in common?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Simple Curve | A curve with no intersections |
| Closed Curve | A curve whose ends are joined |
| Plane Curve | A curve on a single plane |
| Open Curve | A curve with open ends |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Scissors, paper, sketches | Various plane shapes are drawn on the paper including simple, open and closed and non-simple curves. Cut them to form surfaces. Cut along the edges to form open and closed curves. |
Real life uses :
Books, Blankets, TV’s, Pizza cases, Tray’s, blocks, bricks etc all have a quadrilateral planes
Practical examples around us
| Examples | Explainations |
|---|---|
| Computer monitors | The monitors form the shape of a quadrilateral. Their faces are plane surfaces with four sides, closed and simple. |
| Floor tiles | The floor tiles have also plane surfaces with four sides, closed and simple. |
What you learn in Theory:
An Intro into plane surfaces, simple open and closed curves and non-simple open and closed curves
What you learn in Practice:
The simple curves do not intersect. The non-simple curves intersect. Plane curves are formed on a plane surface. Many surfaces like those of buses, trains, air-planes are generated from these simple surfaces