Wilfrid Laurier University

• MA 122

• Name: Student Number: Spring 2021 1. [5 marks] The game of TETRIS is a tile matching video game that involves rotating and translating random "falling" pieces to form rows at the bottom of the playing area. As solid horizontal rows are formed, the rows disappear and points are scored. Consider the movement of the íTípiece in the graph provided (the solid line is its starting position and the dashed line is its Önishing position). (a) To move the piece from its starting position to its Önishing position it could be reáected over the y-axis and then rotated 90o counter-clockwise. Determine: (i) the standard matrix A for the reáection over the y-axis. (ii) the standard ma