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橢圓3--平行四邊形法
Author:
15黃瀚霆
GeoGebra
New Resources
拼砌四邊形
錐體建築師
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
異分母分數減法
Discover Resources
perd fr ctr bisect
沈暐珊 橢圓反射
Linking dots (Function)
工具：PlaneArrows, PlaneText... (v.2)
探究平行四邊形面積
Discover Topics
Perimeter
Cube
Upper and Lower Sum or Riemann Sum
Kite
Square