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10 questions from this quiz
6.56.56.5 square units
(x2−x1)2+(y2−y1)2\sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}(x2−x1)2+(y2−y1)2
424\sqrt{2}42 units
To ensure area is positive
Yes, it works for any triangle
Determinant of a matrix
−13-13−13
323232
Distance formula
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)x1(y2−y3)+x2(y3−y1)+x3(y1−y2)
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