This video goes through an example of how to rotate a line 90 degrees by using matrix rotation.
Matrix Rotation is a free educational video by MathPlanetVideos.It helps students in grades 9,10,11,12 practice the following standards HSN.VM.A.2,HSN.VM.C.12,.
1. HSN.VM.A.2 : Find the components of a vector by subtracting the coordinates of an initial point from the coordinates of a terminal point..
2. HSN.VM.C.12 : Work with 2 × 2 matrices as a transformations of the plane, and interpret the absolute value of the determinant in terms of area..