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E3 P5 日照与杆影变化
Author:
yiyi
GeoGebra
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斐波那契螺旋弧线（表格法）
折扣
常见四边形是否是双心四边形
直線的斜率：水平變化 & 鉛垂變化
科赫雪花
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指數與對數的對稱性
角平分線性質
內輪差...
ghseh 二次函數上下y值差
定积分求几何体体积 Definite Integral
Discover Topics
Trapezoid
Sine
Tangent Function
Means
Optimization Problems