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正四面體
Author:
明欣
正四面體
GeoGebra
New Resources
找出對稱軸
異分母分數減法
画直线等分三角形的面积
球体的体积推导（优化版）
【案例】2018年全国1卷理科12题
Discover Resources
Quiz on Simplifying Monomials 化簡單項式：測驗
垂心軌跡
科學記號
Strike and Dip 地層的走向與傾角模擬
立體旋轉卡片
Discover Topics
Curve Sketching
Fractal Geometry
Line Segment
Tangent Line or Tangent
Tangent Function