Education Technology

Triangle in the Matrix

Activity Overview

Students represent a triangle with a matrix and use the determinant to find the area of three given triangles.

Key Steps

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    Students will find the area of a right triangle using a matrix and verify the formula using A = 0.5bh.

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    Students will practice using the matrix formula by finding the area of two non-right triangles using matrices. 

    In the extension, students are asked to find the vertex of a triangle given the other two vertices and the area.