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Invariant points in the line x=y. Points B, C, D are invariant in the line x=y. But A is reflected as A' in the line x=y.

作成者:abhishek
トピック:鏡映

Invariant points in the line x=y. Points B, C, D are invariant in the line x=y. But A is reflected as A' in the line x=y.

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