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一线三等角模型
Author:
许业成
GeoGebra
New Resources
第三周作业效果演示
中华人民共和国国旗
盈利與虧蝕
第八周作业2
活动三:应用性质
Discover Resources
角α与-α的正弦函数关系
GeoGebra繪本
直角梯形
線性組合
点、线、角
Discover Topics
Equilateral Triangles
Conic Sections
Linear Functions
Straight Lines
Sine