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圖二的副本
Author:
Siqiu Zeng
,
GeoGebra Institute of Hong Kong
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
画直线等分三角形的面积
兩位數除以一位數（一）
第八周作业
Discover Resources
GGB-BOOK
testing
斯坦納-雷米歐司(Steiner-Lehmus)定理證明三
三角形內角和180度
简易立体几何的副本
Discover Topics
Difference and Slope
Combinatorics
Equations
Diagrams
Pie Chart or Circle Chart