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S2E3L6夏至的日照与竿影变化
Author:
浅蓝色
GeoGebra
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祖冲之的期望：内棋与外棋
圓的切線方程
第八周作业3
多邊形的面積
龙形曲线-分形龙2
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正多邊形的對角線
可积准则
正四角錐
test
兩位數除三位數(商>10)
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Ellipse
Quadratic Functions
Optimization Problems
Quadrilaterals
Histogram