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周界平移
Author:
Tam Ho Yin
GeoGebra
New Resources
龙形曲线-分形龙
盈利與虧蝕
直線的斜率：水平變化 & 鉛垂變化
比較五件物件的重量
第八周作业2
Discover Resources
圓與切線
Trajectory of system: y'=sin(y)-y/2
相同圖形的拼砌（有兩組平行線的四邊形）
圖解直式開方
拋物線(上下型)標準式
Discover Topics
Line Segment
Distributions
Dilation
Perimeter
LCM and GCD