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余弦定理
Author:
洋葱教研
GeoGebra
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活动三：应用性质
撒针估算面积实验
双心四边形
直線的斜率：水平變化 & 鉛垂變化
科赫雪花
Discover Resources
test test test
Name the prism 1
圖B
平行2
N邊形滾動的副本
Discover Topics
Arithmetic
Isosceles Triangles
Cuboid
Rhombus
Limits