Q. 205.0( 1 Vote )

Using vectors, fi

Answer :

Given,


A triangle with vertices A (1, 1, 2), B (2, 3, 5) and C (1, 5, 5)


Key Point: Area of a triangle (ΔABC) is given by – Area =


We are given with the coordinates, or we can say the P.V of points A, B and C.


We can say that –



)î



Similarly,



Area of required triangle =


So, first, we find the magnitude of cross product and then we will apply the formula-


=


Expanding about 1st row –




|| =


Area of required triangle =


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses