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平行四邊形的高
Author:
whtong
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
拼砌四邊形
柱體建築師
直角坐標平面上的旋轉變換
Discover Resources
橢圓
Locus: Fixed Distance From Fixed Point
高斯定理：對角線中點共線
test1
圆锥的侧面展开图3D动画的副本
Discover Topics
Solids or 3D Shapes
Isosceles Triangles
Cone
Scatter Plot
Vectors 2D (Two-Dimensional)