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平面立体截图
Author:
艳er
GeoGebra
New Resources
比較五件物件的重量
盈利與虧蝕
折扣
平行線的判定
双心四边形
Discover Resources
Sequence指令練習(二維3)
test1(尋找北極星)
四邊形四個九點圓共點(九點心)
单晨答上海鲍老师
两角和的余弦公式几何证明
Discover Topics
Sine
Pyramid
Linear Equations
Arithmetic Operations
Parallelogram