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QP3.18
Author:
Pokman Cheng
GeoGebra
New Resources
近似值：有效數字
長方體平面投影 (Codex版)
畫出對稱圖形
sanjiaohanshu
算柱 (兩位數)
Discover Resources
阿基米德螺線
俄羅斯方塊
四面體 ABCD, AB 與 CD 距離
橢圓1--同心圓法
橢圓規Ellipsograph (Trammel of Archimedes)
Discover Topics
Equilateral Triangles
Angles
Quadratic Functions
Tree Diagrams
Area