Answers

2015-06-12T16:09:39+05:30
We know that the area of a triangle = 1/2[x₁(y₂-y₃)+x₂(y₃-y₁)+x₃(y₁-y₂)]
          Given points are P(-1.5,3),Q(6,-2),R(-3,4)
     Let these points be P(x₁,y₁),Q(x₂,y₂),R(x₃,y₃).
       Now substituting these values in the above formula.
                  = 1/2[-1.5(-2-4)+6(4-(-1.5))+(-3)(3-(-2))]
                  = 1/2[-1.5(-6)+6(5.5)+(-3)5]
                  = 1/2[4.5+33+(-15)]
                  = 1/2[22.5]
                  = 11.25.
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