Learning Resources

Focus C: Matrix Multiplication

Question #3

• You may want to draw a diagram on graph paper to determine the coordinates of the image triangle.
• If you are finding this question challenging, follow the steps outlined in Questions 1 and 2 to develop the matrix.
• Solving the resulting systems of equations for a, b, c, and d will generate the elements of the matrix that can be used to rotate an object 90° about the origin under matrix multiplication.