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【初三数学】统考分类集 (p216 #23)
Author:
Kee0114
Topic:
Circle
统考分类集【p216 选择题#23】 已 知:PC=6m,CD=14m,PA=5m,求AB。 猜 想:是不是只要符合已知条件,不同的圆(半径不同)都可以算得到同样的AB? 画图设定:将已知条件P,C,D按给定的长度排好。 以P为圆心,画一半径为5m的圆,此圆与大圆的交点为A。 PA的延长线交到大圆的另一端者为B。 实 验:移动A点,使大圆半径改变,观察AB的长度是否跟着改变。
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