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龜甲
Author:
呂麗珠
GeoGebra
New Resources
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
長方體平面投影 (Codex版)
近似值：有效數字
美國國旗 (Codex 版)
Discover Resources
三角形的外接圓
Add and subtract
三角形的垂心
橢圓規Ellipsograph (Trammel of Archimedes)
直线与圆的位置关系
Discover Topics
Interest Calculation
Geometric Distribution
Hyperbola
Geometry
Random Variables