MATH / ANALYTIC GEOMETRY
Calculate triangle area from three Cartesian vertices using the determinant form. Inspect the equation, substituted values, result, and interpretation limits in one guided workspace.
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Calculate triangle area from three Cartesian vertices using the determinant form. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.
A=|x1(y2-y3)+x2(y3-y1)+x3(y1-y2)|/2
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What you receive
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Coordinates and lengths use one consistent Cartesian scale; rounding is applied only to the displayed result.
Use internally consistent units and retain extra precision when carrying the result into another calculation.
Reviewed reference factors