Step 1: Understand what a matrix is. A matrix is a rectangular array of numbers arranged in rows and columns.
Step 2: Identify the main diagonal of the matrix. The main diagonal runs from the top left corner to the bottom right corner.
Step 3: Look at the elements on the main diagonal. These are the numbers that are located at positions where the row number and column number are the same.
Step 4: Add up all the numbers you found on the main diagonal. This total is called the trace of the matrix.
