An equilateral triangle has each of its ...

An equilateral triangle has each of its sides of length 6 cm. If `(x_1, y_1);(x_2, y_2)&(x_3, y_3)` are its vertices, then the value of the determinant `|x_1y_1 1x_2y_2 1x_3y_3 1|^2` is equal to: 192 (b) 243 (c) 486 (d) 972

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