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蝴蝶線 butterfly line
Author:
MathChou
Click "Run/Stop" button to try the move.
GeoGebra
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四邉形 (四年級) 教師版
四邊形的特性
兩位數加法
兩位數除以一位數（一）
兩組對邊相等的四邊形
Discover Resources
正20面體展開
test
面積題 B
Protractor-usage
弦中點的軌跡的副本
Discover Topics
Surface
Vectors
Piecewise Functions
Polygons
Congruence