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in Co-ordinate geometry by (63.5k points)

Three points A(3, 6), B(7, 8) and C(5, 2) are the vertices of 4ABC. Find the area of this triangle using the formula given above.

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Best answer

The area of the triangle is

|1/2(6(5 - 7) + 8(3 - 5) + 2(7 - 3))| = |(-12 - 16 + 8)/2| = 10.

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