A student obtains the value of for a triangle as

MATHEMATICS · Subjective · CBSE · Mathematics · Coordinate Geometry · Coordinate Geometry

Problem

A student obtains the value of x1(y2−y3)+x2(y3−y1)+x3(y1−y2)x_1(y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2) for a triangle as −18-18. What does the negative sign indicate, and what is the actual area of the triangle?

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