Determinants are used to find the area of a triangle whose vertices are given by three points

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Determinants are used to find the area of a triangle whose vertices are given by three points in a rectangular coordinate system. The area of a triangle with vertices (x1, y1), (x, y2), and (x3 , y3) isimage


where the ± { symbol indicates that the appropriate sign should be chosen to yield a positive area. Use this information to work Exercises 49–50.


Use determinants to find the area of the triangle whose vertices are (1, 1), (-2, -3), and (11, -3).

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College Algebra

ISBN: 9780134453262

7th Edition

Authors: Robert F Blitzer

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