図形を原点を中心に反時計回りに 90 度回転します
回転数 (より簡単な方法) 90 180 270
任意の点を中心とした反時計回りの 90 度回転
変換 - 原点を中心に 90 度回転
ジオメトリの回転の説明 (90、180、270、360)
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