Kinds Of Quadrilateral
Chapter Name : Understanding Quadrilateral |
Sub Topic Code : 104_08_03_04_01 |
Topic Name : Kinds Of Quadrilateral |
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Sub Topic Name : Trapezium |
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Introduction
Most often we come across quadrilateral which has two parallel sides but the there is no specific criteria over other two. These are called trapezium.
Pre-Requisites:
Basic knowledge about polygons
Activity:
We can observe what type of a quadrilateral becomes a trapezium and what type of trapezium becomes isosceles by doing the learning aid activity.
Real Life Question:
What is the shape of docks in a bus station?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Quadrilateral | A simple closed curve with four vertices and four sides |
| Trapezium | A quadrilateral with two parallel sides |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Scissors, paper, sketches, ruler, Protractor | Quadrilaterals are drawn on the paper in different shapes. Check the angles of different sides and see if any are equal. Check if the lengths of non-parallel sides are equal in any case. |
Real life uses :
Glasses, Utensils, Tents, pencil boxes, some acoustic guitars have trapezoidal shapes
Practical examples around us
| Examples | Explainations |
|---|---|
| Tents | Tents are made such that the bottom of the tent occupies maximum area compared to the top of tent. The bottom and top are parallel while the sides are of same length. It is an isosceles trapezium. |
What you learn in Theory:
An Intro into Trapezium and Isosceles trapezium.
What you learn in Practice:
A trapezium is a quadrilateral with parallel sides. Two sides are parallel if they make the same angle with the reference side. A trapezium is isosceles if the non-parallel sides are equal. These have applications in understanding many architectural marvels.