Question

Find area of triangle ABC shown in figure using determinant.

Answer 1

A(1 , 1)

B(3 , 4)

C(2 , 5)

Area of triangle ABC =$\frac{1}{2} [x_{1} (y_{2} - y_{3} ) + x_{2} (y_{3} - y_{1} ) + x_{3} (y_{1} - y_{2} )]$=2.5 sq unit

Answer 2

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