area   3 videos

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  Area With Determinants

  Precalculus Systems of Linear Equations and Matrices

  How to compute the area of a parallelogram using a determinant.

  parallelogram vectors determinant area
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  Using Sine to Calculate the Area of a Triangle

  Precalculus Basic Trigonometry

  How to calculate the area of any triangle using two sides and an included angle.

  area of a triangle sine
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  Area With the Cross Product

  Precalculus Systems of Linear Equations and Matrices

  How to show that the magnitude of the cross product of two vectors gives the area of the parallelogram determined by those two vectors.

  cross product magnitude of vectors dot product angle between vectors area parallelogram