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Unformatted text preview: xy . The rst two rows have been completed for you as an example. Id Id Id Id Exercise 65. If we let R denote counterclockwise rotation by degrees, H denote the ip across the vertical axis, V denote the ip across the horizontal axis, and F i ( i = 1 , 2) denote the diagonal ips, then recall that the complete set if symmetries of the square is D 4 = { R ,R 90 ,R 180 ,R 270 ,V,H,F 1 ,F 2 } . Compute the composition table for D 4 as you did for S 3 above....
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 Fall '09
 RyanDaileda
 Division, Subtraction

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