This self checking worksheet has the students solving the determinant of a 3x3 matrix.
It also gives the students an answer to 'When are we ever going to use determinants in real life!!??' If three points of a triangle are known, determinants can be used to find the area. Since 3x3 determinants take a while, there are only 6 problems on this worksheet. When completed, this worksheet will reveal the answer to a riddle.