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Twist Bottle
Author:
陳隆期
GeoGebra
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球體建築師
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
兩位數除以一位數（一）
四邉形 (四年級) 教師版
Discover Resources
內心
n星角
test1
教案一
柱體的橫截面
Discover Topics
Root
Line Segment
Isosceles Triangles
Hypergeometric Distribution
Multiplication