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第1章 直角坐标系与直线 探索活动2
Autore:
Lim Fang Shin
Argomento:
Coordinate
,
Equazioni lineari
探索活动2:观察点旋转90°的坐标变化
(pg) 1. 随意移动点A。写出A'所在的象限及坐标。A’的坐标与A的坐标有什么关系? 2. 滑动α滑杆至270°。写出A'的坐标及所在象限。A’的坐标与A的坐标有什么关系?
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结论: 将点(x,y)绕原点旋转90°后的像的坐标为( , )。 将点(x,y)绕原点旋转270°后的像的坐标为( , )。
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