This precalculus video tutorial explains how to calculate the area of a triangle by finding the determinant of a 3x3 matrix.

Matrices - Free Formula Sheet: bit.ly/3UE9Cmk

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Algebra and Precalculus Video Playlist:
www.video-tutor.net/

Area of a Triangle - Heron's Formula:
   • Area of a Triangle, Given 3 Sides, He...  

Area of an Equilateral Triangle:
   • Area of an Equilateral Triangle  

Intro to Matrices:
   • Intro to Matrices