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二面角
Author:
qianqianhouhou
二面角的概念，拖动A、E点改变半平面
GeoGebra
New Resources
找出對稱軸
三位數除以一位數（一）
sanjiaohanshu
判斷球體
【案例】2013年安徽高考15题
Discover Resources
正弦與正切值的大小關係
題3
诱导公式三（x轴对称关系）
Transformation Golf 1-18 (Working)
探究三角形的全等條件
Discover Topics
Arithmetic Operations
Reflection
Complex Numbers
Quadratic Functions
Interest Calculation