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Rotation
作者：
AGHalley
Rotation of a triangle.
GeoGebra
最新資源
兩位數的位值
Prism Drawn in 2-Point Perspective
Area Between Two Curves
Slope Between 2 Points (Phase 2)
Neuberg's Theorem
探索資源
線段相加
example
Herons Formula
All different centres of circle in one triangle
GoGeometry Action Applets!
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微分
等式
梯形
黎曼和（Riemann Sum）
反射