compare floods of Jammu and Kashmir and Uttarakhand 2015 (detailed analysis)
Answers
Answer:
Explanation:
As we know the value of a determinant can either be negative or a positive value but since we are talking about area and it can never be taken as a negative value, therefore we take the absolute value of the determinant so obtained.
If the area of the triangle is already given then we make use of both the positive and negative values of the determinant.
Also, if three points are collinear we would be left with a straight line instead of a triangle and as the area enclosed by a straight line is zero hence the value of the determinant will also be zero.
Keeping the above-mentioned points in mind, let us try to expand the determinant which denoted the area by using determinant expansion techniques using minors and cofactors.