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图形与变换( 1 ) PowerPoint PPT Presentation


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图形与变换( 1 ). —— 平移、旋转和轴对称. 广州市47中汇景实验学校 李朝阳. D. A. O. E. B. C. 如图,长方形 ABCD 中,对角线 AC 与 BD 相交于 O , DE∥AC , CE∥BD ,那么△ ABD 可以看作是由△ ____ 旋转得到,旋转中心是 ____ ,△ DEC 可以看作是由△ AOB 经过 ____ 变换得到;有没有与△ DEC 成轴对称的三角形?中心对称呢?图中还有没有其它类似的图形变换?. C D B. 点 O. 平移.

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图形与变换( 1 )

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