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congruent activity
Author:
lamanleung
GeoGebra
New Resources
画直线等分三角形的面积
四邊形的特性
球体的体积推导（优化版）
第八周作业
三位數除以一位數（二）
Discover Resources
教學－橫切面
分數(二)
fixed arc length and fixed shaded area
三節棍
對稱圖形
Discover Topics
Optimization Problems
Right Triangles
Intersection
Function Graph
Polygons