The Area of a Triangle Using a Determinant
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The area of a triangle with vertices at the coordinates ,
, and
is the absolute value of
.
Contributed by: George Beck (March 2011)
Open content licensed under CC BY-NC-SA
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For how to calculate a 3×3 determinant, see the first two related links.
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"The Area of a Triangle Using a Determinant"
http://demonstrations.wolfram.com/TheAreaOfATriangleUsingADeterminant/
Wolfram Demonstrations Project
Published: March 7 2011