Question

Find the area of triangle whose vertices are (3,4); (7,2) and (-5,6)

Answer 1

Let  A (3,4) = (x₁,y₁)

       B (7,2) = (X₂,Y^₂) and

       C (-5,6) = (X₃,Y₃) be the vertices of  ΔABC.

Then the area of  ΔABC will be