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Surface with Square Cross Sections
Author:
袁智强
GeoGebra
New Resources
龙形曲线-分形龙
双心四边形
活动三：应用性质
直線的斜率：水平變化 & 鉛垂變化
盈利與虧蝕
Discover Resources
Construct a regular pentagon
方格紙上畫菱形3
S5 Permutation and Combination
角錐體積
刘校安排（1）
Discover Topics
Integers
Right Triangles
Hyperbola
Parabola
Rotation