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动态曲线
Author:
九章算术
Topic:
Functions
GeoGebra
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兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
拼砌四邊形
【案例】2018年全国1卷理科12题
異分母分數減法
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模擬圓規
congruent (SAS)
laptop height
「相似三角形」任务3的副本
三阶魔方（magic cube）
Discover Topics
Solids or 3D Shapes
Orthocenter
Parametric Curves
Step Functions
Vectors 2D (Two-Dimensional)