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HKDSE 2015 by Mr LO WY
Author:
tcchan
GeoGebra
New Resources
兩組對邊相等的四邊形
球体的体积推导（优化版）
四邊形的特性
找出對稱軸
柱體建築師
Discover Resources
Ruler
拋物線
二次函数图象与a,m,k关系的副本
等腰三角形
Hamid Naderi Yeganeh segment3
Discover Topics
Line Segment
Polygons
Rhombus
Addition
Trapezoid