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任意角的三角比
Author:
Kooky Leung
GeoGebra
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常见四边形是否是双心四边形
撒针估算面积实验
第八周作业3
龙形曲线-分形龙
第八周作业1
Discover Resources
弦心距比較
ie 9
test
正十二面體內接正六面體旋轉
双动点求三角形最大面积演示
Discover Topics
Fractions
Dilation
Vectors
Square
Inequalities