Instructional Video

Khan Academy: Linear Algebra: Determinant and Area of a Parallelogram

Curated by ACT

Video demonstrating that the area of a parallelogram created by graphing the column vectors of a 2x2 matrix is the equivalent to the absolute value of the determinant of the matrix. Pythagorean theorem, in conjunction with calculating a projection and dot products, is used to determine the height of the parallelogram. Dot products are used to calculate the area. [21:37]

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CCSS: Designed
Common Core