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认识三角形的高
Author:
陈力
GeoGebra
New Resources
画直线等分三角形的面积
兩位數除以一位數（一）
三位數除以一位數（二）
四邊形的特性
兩組對邊相等和有直角的四邊形
Discover Resources
Plainmeter explained
圓錐曲線Conic
自動調整切割數的積分
認識圓
test
Larry's Clock
Discover Topics
Intersection
Ratios
Rhombus
Stochastic Process or Random Process
Exponent