Introduction
Chapter Name : Mensuration |
Sub Topic Code : 104_08_11_01_01 |
Topic Name : Introduction |
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Sub Topic Name : Introduction |
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Introduction
Perimeter & Area are important criteria in studying polygons & other plane figures which we see in our day-to-day life. Example is given explaining how the perimeter of the fence would be calculated & cost of fencing it per unit width
Pre-Requisites:
Areas & perimeters of triangles, rectangles, circles etc.
Activity:
Check out an irregular apartment around your area. You will see that it is made up of several regular polygons
Real Life Question:
How does the neighbor know the total area of his house?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Perimeter | Distance around by the boundary |
| Area | Region covered by the boundary |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Speakers | Take your short scale and measure the area of the speakers (which are mostly rectangular) |
Real life uses :
Mensuration is everywhere. In every aspect of life, one needs to calculate areas & perimeters. For Ex. If you want to paint your house, you need to know what is the total area of the walls that require painting
Places to visit :
Malls, Apartments
Practical examples around us
| Examples | Explainations |
|---|---|
| Leaf | If you want to measure the area of a leaf, you will have to divide it into a number of regular triangles using a graph sheet & then sum up the individual areas |
| Building a house | This requires calculating the area & perimeter of the plot |
What you learn in Theory:
Areas & perimeters of polygons (mostly quadrilaterals) and also surface area and total area concepts
What you learn in Practice:
Calculation of areas & perimeters is a general, every day phenomenon