Education Technology

Algebra II: Dilations with Matrices
by Texas Instruments

Updated on February 16, 2015

Overview

Students use matrices to perform dilations centered at the origin of triangles. Students will explore the effect of the scale factor on the size relationship between the preimage and image of a polygon.

Key Steps

  • Image

    Students explore the relationship between the preimage and image under a dilation centered at zero.

  • Image

    Students will use matrix multiplication to perform a dilation and determine the vertex coordinates of the image.