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轨迹与最值问题17
Author:
万超杰
GeoGebra
New Resources
畫出對稱圖形
柱體建築師
異分母分數減法
三位數除以一位數（一）
算柱 (兩位數)
Discover Resources
優良作品1(力嘉)
vertex
周长相等，正方形，长方形和正三角形，圆面积大小比较
烟囱
小正多边形在大正多边形内的滚动（边长相等）
Discover Topics
Addition
Congruence
Secant Line or Secant
Angles
Intersection