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gjc090a23 園內三角形與角度
Author:
謝定原
GeoGebra
New Resources
龙形曲线-分形龙2
平行線的判定
直線的斜率：水平變化 & 鉛垂變化
折扣
双心四边形
Discover Resources
盒子的體積
拋物線聖路易拱門
中點軌跡(動點在兩圓上)
Doppler Effect and Shockwave
拋物線6--包絡線法
Discover Topics
Quadrilaterals
Arithmetic Operations
Geometric Transformations
Surface
Statistical Characteristics