Area Of A Triangle
Chapter Name : Determinants |
Sub Topic Code : 104_12_04_04_01 |
Topic Name : Area Of A Triangle |
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Sub Topic Name : Area Of A Triangle |
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Introduction
Using determinants and given the co-ordinates of a triangle, the area can be found using the formula ½ x determinant of coordinates row wise and the remaining column elements equal to 1.
Pre-Requisites:
Basics of determinants
Activity:
To measure the vertices, a point must be placed as origin and units must be measured from it to the vertex points of the triangle.
Real Life Question:
How can co-ordinates of a triangle be found in real life?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Vertices | Vertices are the end points of a shape. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Triangle on floor | The area of the triangle can be found using determinants. |
Real life uses :
To find area of triangular shapes and constructions.
Practical examples around us
| Examples | Explainations |
|---|---|
| Road signs | Road signs are usually triangular in shape; using determinants the area of material used to make it can be calculated. |
What you learn in Theory:
Area of a triangle using determinants.
What you learn in Practice:
To find area of triangles found around us.