Solution 1A. Symmetry of the square. For the problems, see p. .
Answers
(a) the identity operation 1, (b) the two-fold rotation 2,
(c) the four-fold rotation 4 = (anti-clockwise),
(d) the four-fold rotation (clockwise),
(e) the reflection in the line ,
(f) the reflection in the line ,
(g) the reflection in the line ,
(h) and the reflection in the line .
1, 2, 4, 4, 2, 2, 2, and 2.
Solution 1B. Symmetry of the square. For the problems, see p. .
Answers
Remarkable properties of the multiplication table are
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